51331145 has 8 divisors (see below), whose sum is σ = 61976256. Its totient is φ = 40812336.

The previous prime is 51331117. The next prime is 51331151. The reversal of 51331145 is 54113315.

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 51331145 - 2⁶ = 51331081 is a prime.

It is a super-2 number, since 2×51331145² = 5269772894022050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51331145.

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, 30677 + ... + 32306.

It is an arithmetic number, because the mean of its divisors is an integer number (7747032).

Almost surely, 2^51331145 is an apocalyptic number.

It is an amenable number.

51331145 is a deficient number, since it is larger than the sum of its proper divisors (10645111).

51331145 is a wasteful number, since it uses less digits than its factorization.

51331145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63151.

The product of its digits is 900, while the sum is 23.

The square root of 51331145 is about 7164.5757027196. The cubic root of 51331145 is about 371.6438786549.

The spelling of 51331145 in words is "fifty-one million, three hundred thirty-one thousand, one hundred forty-five".