51620384 has 24 divisors (see below), whose sum is σ = 101787840. Its totient is φ = 25769536.

The previous prime is 51620383. The next prime is 51620389. The reversal of 51620384 is 48302615.

It is not an unprimeable number, because it can be changed into a prime (51620383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38477 + ... + 39795.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^51620384 is an apocalyptic number.

It is an amenable number.

51620384 is a deficient number, since it is larger than the sum of its proper divisors (50167456).

51620384 is a wasteful number, since it uses less digits than its factorization.

51620384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552 (or 2544 counting only the distinct ones).

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

The square root of 51620384 is about 7184.7327020565. The cubic root of 51620384 is about 372.3406137624.

Adding to 51620384 its reverse (48302615), we get a palindrome (99922999).

The spelling of 51620384 in words is "fifty-one million, six hundred twenty thousand, three hundred eighty-four".