51616236 has 48 divisors (see below), whose sum is σ = 144892160. Its totient is φ = 13970880.

The previous prime is 51616189. The next prime is 51616237. The reversal of 51616236 is 63261615.

It is not an unprimeable number, because it can be changed into a prime (51616237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14575 + ... + 17766.

Almost surely, 2^51616236 is an apocalyptic number.

It is an amenable number.

51616236 is an abundant number, since it is smaller than the sum of its proper divisors (93275924).

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

51616236 is a wasteful number, since it uses less digits than its factorization.

51616236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32374 (or 32372 counting only the distinct ones).

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

The square root of 51616236 is about 7184.4440285940. Note that the first 3 decimals coincide. The cubic root of 51616236 is about 372.3306402460.

The spelling of 51616236 in words is "fifty-one million, six hundred sixteen thousand, two hundred thirty-six".