51001315 has 4 divisors (see below), whose sum is σ = 61201584. Its totient is φ = 40801048.

The previous prime is 51001303. The next prime is 51001367. The reversal of 51001315 is 51310015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51001315 - 2⁵ = 51001283 is a prime.

It is a super-2 number, since 2×51001315² = 5202268263458450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100127 + ... + 5100136.

It is an arithmetic number, because the mean of its divisors is an integer number (15300396).

Almost surely, 2^51001315 is an apocalyptic number.

51001315 is a deficient number, since it is larger than the sum of its proper divisors (10200269).

51001315 is a wasteful number, since it uses less digits than its factorization.

51001315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200268.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 51001315 is about 7141.5204963649. The cubic root of 51001315 is about 370.8461642098.

The spelling of 51001315 in words is "fifty-one million, one thousand, three hundred fifteen".