51622636 has 24 divisors (see below), whose sum is σ = 99129744. Its totient is φ = 23375040.

The previous prime is 51622633. The next prime is 51622643. The reversal of 51622636 is 63622615.

It is a junction number, because it is equal to n+sod(n) for n = 51622598 and 51622607.

It is not an unprimeable number, because it can be changed into a prime (51622633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6610 + ... + 12121.

It is an arithmetic number, because the mean of its divisors is an integer number (4130406).

Almost surely, 2^51622636 is an apocalyptic number.

It is an amenable number.

51622636 is a deficient number, since it is larger than the sum of its proper divisors (47507108).

51622636 is a wasteful number, since it uses less digits than its factorization.

51622636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18801 (or 18799 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 51622636 is about 7184.8894215569. The cubic root of 51622636 is about 372.3460282828.

The spelling of 51622636 in words is "fifty-one million, six hundred twenty-two thousand, six hundred thirty-six".