51496740 has 72 divisors (see below), whose sum is σ = 165405240. Its totient is φ = 12923904.

The previous prime is 51496733. The next prime is 51496751. The reversal of 51496740 is 4769415.

It can be written as a sum of positive squares in 4 ways, for example, as 1115136 + 50381604 = 1056^2 + 7098^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51496695 and 51496704.

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 23 ways as a sum of consecutive naturals, for example, 5355 + ... + 11474.

It is an arithmetic number, because the mean of its divisors is an integer number (2297295).

Almost surely, 2^51496740 is an apocalyptic number.

It is an amenable number.

51496740 is an abundant number, since it is smaller than the sum of its proper divisors (113908500).

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

51496740 is a wasteful number, since it uses less digits than its factorization.

51496740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16861 (or 16856 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 51496740 is about 7176.1229086464. The cubic root of 51496740 is about 372.0430924759.

The spelling of 51496740 in words is "fifty-one million, four hundred ninety-six thousand, seven hundred forty".