51431995 has 8 divisors (see below), whose sum is σ = 62883216. Its totient is φ = 40369056.

The previous prime is 51431983. The next prime is 51432001. The reversal of 51431995 is 59913415.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51431995 - 2¹³ = 51423803 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96777 + ... + 97306.

It is an arithmetic number, because the mean of its divisors is an integer number (7860402).

Almost surely, 2^51431995 is an apocalyptic number.

51431995 is a deficient number, since it is larger than the sum of its proper divisors (11451221).

51431995 is a wasteful number, since it uses less digits than its factorization.

51431995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194141.

The product of its digits is 24300, while the sum is 37.

The square root of 51431995 is about 7171.6103491475. The cubic root of 51431995 is about 371.8871082845.

The spelling of 51431995 in words is "fifty-one million, four hundred thirty-one thousand, nine hundred ninety-five".