51081575 has 12 divisors (see below), whose sum is σ = 63542808. Its totient is φ = 40735200.

The previous prime is 51081533. The next prime is 51081581. The reversal of 51081575 is 57518015.

It is a happy number.

It is not a de Polignac number, because 51081575 - 2⁸ = 51081319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5189 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (5295234).

Almost surely, 2^51081575 is an apocalyptic number.

51081575 is a deficient number, since it is larger than the sum of its proper divisors (12461233).

51081575 is a wasteful number, since it uses less digits than its factorization.

51081575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6514 (or 6509 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 51081575 is about 7147.1375389032. The cubic root of 51081575 is about 371.0405939264.

The spelling of 51081575 in words is "fifty-one million, eighty-one thousand, five hundred seventy-five".