51657499322 has 24 divisors (see below), whose sum is σ = 91722443988. Its totient is φ = 21674473920.

The previous prime is 51657499303. The next prime is 51657499337. The reversal of 51657499322 is 22399475615.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38947417201 + 12710082121 = 197351^2 + 112739^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8206883 + ... + 8213174.

Almost surely, 2^51657499322 is an apocalyptic number.

51657499322 is a deficient number, since it is larger than the sum of its proper divisors (40064944666).

51657499322 is a wasteful number, since it uses less digits than its factorization.

51657499322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16420094 (or 16420083 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 53.

The spelling of 51657499322 in words is "fifty-one billion, six hundred fifty-seven million, four hundred ninety-nine thousand, three hundred twenty-two".