51251024 has 20 divisors (see below), whose sum is σ = 108326400. Its totient is φ = 23295840.

The previous prime is 51251023. The next prime is 51251027. The reversal of 51251024 is 42015215.

It is a super-2 number, since 2×51251024² = 5253334922097152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51250987 and 51251005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51251023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145424 + ... + 145775.

It is an arithmetic number, because the mean of its divisors is an integer number (5416320).

Almost surely, 2^51251024 is an apocalyptic number.

It is an amenable number.

51251024 is an abundant number, since it is smaller than the sum of its proper divisors (57075376).

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

51251024 is a wasteful number, since it uses less digits than its factorization.

51251024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291218 (or 291212 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51251024 is about 7158.9820505432. The cubic root of 51251024 is about 371.4504159595.

Adding to 51251024 its reverse (42015215), we get a palindrome (93266239).

The spelling of 51251024 in words is "fifty-one million, two hundred fifty-one thousand, twenty-four".