51881135 has 8 divisors (see below), whose sum is σ = 64265856. Its totient is φ = 40165920.

The previous prime is 51881131. The next prime is 51881147. The reversal of 51881135 is 53118815.

It is a happy number.

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

It is not a de Polignac number, because 51881135 - 2² = 51881131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51881131) 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, 167204 + ... + 167513.

It is an arithmetic number, because the mean of its divisors is an integer number (8033232).

Almost surely, 2^51881135 is an apocalyptic number.

51881135 is a deficient number, since it is larger than the sum of its proper divisors (12384721).

51881135 is a wasteful number, since it uses less digits than its factorization.

51881135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334753.

The product of its digits is 4800, while the sum is 32.

The square root of 51881135 is about 7202.8560307700. The cubic root of 51881135 is about 372.9664981039.

The spelling of 51881135 in words is "fifty-one million, eight hundred eighty-one thousand, one hundred thirty-five".