51090325 has 48 divisors (see below), whose sum is σ = 76995072. Its totient is φ = 33120000.

The previous prime is 51090323. The next prime is 51090329. The reversal of 51090325 is 52309015.

51090325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51090325 - 2¹ = 51090323 is a prime.

It is a super-2 number, since 2×51090325² = 5220442617211250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 51090325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51090323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110595 + ... + 111055.

It is an arithmetic number, because the mean of its divisors is an integer number (1604064).

Almost surely, 2^51090325 is an apocalyptic number.

51090325 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51090325 is a deficient number, since it is larger than the sum of its proper divisors (25904747).

51090325 is a wasteful number, since it uses less digits than its factorization.

51090325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 51090325 is about 7147.7496458676. The cubic root of 51090325 is about 371.0617784718.

It can be divided in two parts, 51090 and 325, that added together give a palindrome (51415).

The spelling of 51090325 in words is "fifty-one million, ninety thousand, three hundred twenty-five".