51620612 has 12 divisors (see below), whose sum is σ = 90664140. Its totient is φ = 25716576.

The previous prime is 51620593. The next prime is 51620651. The reversal of 51620612 is 21602615.

It can be written as a sum of positive squares in 2 ways, for example, as 5597956 + 46022656 = 2366^2 + 6784^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22187 + ... + 24402.

It is an arithmetic number, because the mean of its divisors is an integer number (7555345).

Almost surely, 2^51620612 is an apocalyptic number.

It is an amenable number.

51620612 is a deficient number, since it is larger than the sum of its proper divisors (39043528).

51620612 is a wasteful number, since it uses less digits than its factorization.

51620612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46870 (or 46868 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51620612 is about 7184.7485690176. The cubic root of 51620612 is about 372.3411619537.

The spelling of 51620612 in words is "fifty-one million, six hundred twenty thousand, six hundred twelve".