51272464 has 20 divisors (see below), whose sum is σ = 102766860. Its totient is φ = 24752000.

The previous prime is 51272461. The next prime is 51272471. The reversal of 51272464 is 46427215.

It can be written as a sum of positive squares in 2 ways, for example, as 36000000 + 15272464 = 6000^2 + 3908^2 .

It is not an unprimeable number, because it can be changed into a prime (51272461) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 54787 + ... + 55714.

It is an arithmetic number, because the mean of its divisors is an integer number (5138343).

Almost surely, 2^51272464 is an apocalyptic number.

It is an amenable number.

51272464 is an abundant number, since it is smaller than the sum of its proper divisors (51494396).

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

51272464 is a wasteful number, since it uses less digits than its factorization.

51272464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110538 (or 110532 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 51272464 is about 7160.4793135655. The cubic root of 51272464 is about 371.5022054071.

Adding to 51272464 its reverse (46427215), we get a palindrome (97699679).

The spelling of 51272464 in words is "fifty-one million, two hundred seventy-two thousand, four hundred sixty-four".