51649032 has 16 divisors (see below), whose sum is σ = 129122640. Its totient is φ = 17216336.

The previous prime is 51649019. The next prime is 51649051. The reversal of 51649032 is 23094615.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075998 + ... + 1076045.

It is an arithmetic number, because the mean of its divisors is an integer number (8070165).

Almost surely, 2^51649032 is an apocalyptic number.

It is an amenable number.

51649032 is an abundant number, since it is smaller than the sum of its proper divisors (77473608).

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

51649032 is a wasteful number, since it uses less digits than its factorization.

51649032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152052 (or 2152048 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 51649032 is about 7186.7260974661. The cubic root of 51649032 is about 372.4094808805.

It can be divided in two parts, 5164 and 9032, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 51649032 in words is "fifty-one million, six hundred forty-nine thousand, thirty-two".