51881535 has 24 divisors (see below), whose sum is σ = 95219280. Its totient is φ = 26042112.

The previous prime is 51881527. The next prime is 51881567. The reversal of 51881535 is 53518815.

It is not a de Polignac number, because 51881535 - 2³ = 51881527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51881535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33145 + ... + 34674.

It is an arithmetic number, because the mean of its divisors is an integer number (3967470).

Almost surely, 2^51881535 is an apocalyptic number.

51881535 is a deficient number, since it is larger than the sum of its proper divisors (43337745).

51881535 is a wasteful number, since it uses less digits than its factorization.

51881535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67847 (or 67844 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 51881535 is about 7202.8837974800. The cubic root of 51881535 is about 372.9674566168.

The spelling of 51881535 in words is "fifty-one million, eight hundred eighty-one thousand, five hundred thirty-five".