51025464 has 120 divisors (see below), whose sum is σ = 166355640. Its totient is φ = 14569632.

The previous prime is 51025453. The next prime is 51025493. The reversal of 51025464 is 46452015.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 30949 + ... + 32555.

It is an arithmetic number, because the mean of its divisors is an integer number (1386297).

Almost surely, 2^51025464 is an apocalyptic number.

51025464 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51025464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83177820).

51025464 is an abundant number, since it is smaller than the sum of its proper divisors (115330176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51025464 is a wasteful number, since it uses less digits than its factorization.

51025464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51025464 is about 7143.2110426614. The cubic root of 51025464 is about 370.9046865630.

Adding to 51025464 its reverse (46452015), we get a palindrome (97477479).

The spelling of 51025464 in words is "fifty-one million, twenty-five thousand, four hundred sixty-four".