51646412 has 12 divisors (see below), whose sum is σ = 90486816. Its totient is φ = 25793040.

The previous prime is 51646409. The next prime is 51646421. The reversal of 51646412 is 21464615.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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, 3443 + ... + 10730.

It is an arithmetic number, because the mean of its divisors is an integer number (7540568).

Almost surely, 2^51646412 is an apocalyptic number.

It is an amenable number.

51646412 is a deficient number, since it is larger than the sum of its proper divisors (38840404).

51646412 is a wasteful number, since it uses less digits than its factorization.

51646412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15088 (or 15086 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 51646412 is about 7186.5438146581. The cubic root of 51646412 is about 372.4031837032.

The spelling of 51646412 in words is "fifty-one million, six hundred forty-six thousand, four hundred twelve".