51245590 has 32 divisors (see below), whose sum is σ = 101627136. Its totient is φ = 18449760.

The previous prime is 51245569. The next prime is 51245591. The reversal of 51245590 is 9554215.

51245590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51245590² = 5252220988896200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245591) 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 15 ways as a sum of consecutive naturals, for example, 9069 + ... + 13591.

It is an arithmetic number, because the mean of its divisors is an integer number (3175848).

Almost surely, 2^51245590 is an apocalyptic number.

51245590 is a deficient number, since it is larger than the sum of its proper divisors (50381546).

51245590 is a wasteful number, since it uses less digits than its factorization.

51245590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 51245590 is about 7158.6025172515. The cubic root of 51245590 is about 371.4372875526.

The spelling of 51245590 in words is "fifty-one million, two hundred forty-five thousand, five hundred ninety".