51520732 has 6 divisors (see below), whose sum is σ = 90161288. Its totient is φ = 25760364.

The previous prime is 51520709. The next prime is 51520753. The reversal of 51520732 is 23702515.

It is a junction number, because it is equal to n+sod(n) for n = 51520697 and 51520706.

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 as a sum of consecutive naturals, namely, 6440088 + ... + 6440095.

Almost surely, 2^51520732 is an apocalyptic number.

It is an amenable number.

51520732 is a deficient number, since it is larger than the sum of its proper divisors (38640556).

51520732 is a wasteful number, since it uses less digits than its factorization.

51520732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12880187 (or 12880185 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 51520732 is about 7177.7943687459. The cubic root of 51520732 is about 372.1008610002.

The spelling of 51520732 in words is "fifty-one million, five hundred twenty thousand, seven hundred thirty-two".