51624636 has 36 divisors (see below), whose sum is σ = 140125608. Its totient is φ = 14749728.

The previous prime is 51624613. The next prime is 51624647. The reversal of 51624636 is 63642615.

It is a junction number, because it is equal to n+sod(n) for n = 51624597 and 51624606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43311 + ... + 44486.

It is an arithmetic number, because the mean of its divisors is an integer number (3892378).

Almost surely, 2^51624636 is an apocalyptic number.

It is an amenable number.

51624636 is an abundant number, since it is smaller than the sum of its proper divisors (88500972).

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

51624636 is a wasteful number, since it uses less digits than its factorization.

51624636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87818 (or 87809 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 51624636 is about 7185.0286011957. The cubic root of 51624636 is about 372.3508367835.

It can be divided in two parts, 516 and 24636, that added together give a palindrome (25152).

The spelling of 51624636 in words is "fifty-one million, six hundred twenty-four thousand, six hundred thirty-six".