51205264 has 30 divisors (see below), whose sum is σ = 109053350. Its totient is φ = 23274240.

The previous prime is 51205249. The next prime is 51205267. The reversal of 51205264 is 46250215.

It can be written as a sum of positive squares in only one way, i.e., 33732864 + 17472400 = 5808^2 + 4180^2 .

It is a super-2 number, since 2×51205264² = 5243958122619392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51205267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11289 + ... + 15160.

Almost surely, 2^51205264 is an apocalyptic number.

It is an amenable number.

51205264 is an abundant number, since it is smaller than the sum of its proper divisors (57848086).

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

51205264 is a wasteful number, since it uses less digits than its factorization.

51205264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26479 (or 26462 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51205264 is about 7155.7853517276. The cubic root of 51205264 is about 371.3398319423.

Adding to 51205264 its reverse (46250215), we get a palindrome (97455479).

The spelling of 51205264 in words is "fifty-one million, two hundred five thousand, two hundred sixty-four".