51087135 has 32 divisors (see below), whose sum is σ = 89579520. Its totient is φ = 24656000.

The previous prime is 51087133. The next prime is 51087173. The reversal of 51087135 is 53178015.

It is not a de Polignac number, because 51087135 - 2¹ = 51087133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51087133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43810 + ... + 44960.

It is an arithmetic number, because the mean of its divisors is an integer number (2799360).

Almost surely, 2^51087135 is an apocalyptic number.

51087135 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51087135 is a deficient number, since it is larger than the sum of its proper divisors (38492385).

51087135 is a wasteful number, since it uses less digits than its factorization.

51087135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 51087135 is about 7147.5264952290. The cubic root of 51087135 is about 371.0540554720.

The spelling of 51087135 in words is "fifty-one million, eighty-seven thousand, one hundred thirty-five".