51624842 has 16 divisors (see below), whose sum is σ = 79835112. Its totient is φ = 25018560.

The previous prime is 51624829. The next prime is 51624883. The reversal of 51624842 is 24842615.

It can be written as a sum of positive squares in 4 ways, for example, as 48011041 + 3613801 = 6929^2 + 1901^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51624799 and 51624808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20492 + ... + 22872.

Almost surely, 2^51624842 is an apocalyptic number.

51624842 is a deficient number, since it is larger than the sum of its proper divisors (28210270).

51624842 is a wasteful number, since it uses less digits than its factorization.

51624842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713.

The product of its digits is 15360, while the sum is 32.

The square root of 51624842 is about 7185.0429365453. The cubic root of 51624842 is about 372.3513320520.

The spelling of 51624842 in words is "fifty-one million, six hundred twenty-four thousand, eight hundred forty-two".