51813537 has 8 divisors (see below), whose sum is σ = 69589536. Its totient is φ = 34289952.

The previous prime is 51813529. The next prime is 51813563. The reversal of 51813537 is 73531815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51813537 - 2³ = 51813529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51813498 and 51813507.

It is not an unprimeable number, because it can be changed into a prime (51813577) 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, 62623 + ... + 63444.

It is an arithmetic number, because the mean of its divisors is an integer number (8698692).

Almost surely, 2^51813537 is an apocalyptic number.

It is an amenable number.

51813537 is a deficient number, since it is larger than the sum of its proper divisors (17775999).

51813537 is a wasteful number, since it uses less digits than its factorization.

51813537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126207.

The product of its digits is 12600, while the sum is 33.

The square root of 51813537 is about 7198.1620570810. The cubic root of 51813537 is about 372.8044433925.

The spelling of 51813537 in words is "fifty-one million, eight hundred thirteen thousand, five hundred thirty-seven".