51551315 has 8 divisors (see below), whose sum is σ = 61923408. Its totient is φ = 41199840.

The previous prime is 51551263. The next prime is 51551333. The reversal of 51551315 is 51315515.

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

It is not a de Polignac number, because 51551315 - 2¹⁶ = 51485779 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, 1025 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (7740426).

Almost surely, 2^51551315 is an apocalyptic number.

51551315 is a deficient number, since it is larger than the sum of its proper divisors (10372093).

51551315 is a wasteful number, since it uses less digits than its factorization.

51551315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10309.

The product of its digits is 1875, while the sum is 26.

The square root of 51551315 is about 7179.9244424994. The cubic root of 51551315 is about 372.1744735001.

The spelling of 51551315 in words is "fifty-one million, five hundred fifty-one thousand, three hundred fifteen".