51284615 has 8 divisors (see below), whose sum is σ = 63663840. Its totient is φ = 39612832.

The previous prime is 51284603. The next prime is 51284647. The reversal of 51284615 is 51648215.

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 51284615 - 2⁴ = 51284599 is a prime.

It is a super-2 number, since 2×51284615² = 5260223471396450, which contains 22 as substring.

It is a congruent 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, 176699 + ... + 176988.

It is an arithmetic number, because the mean of its divisors is an integer number (7957980).

Almost surely, 2^51284615 is an apocalyptic number.

51284615 is a deficient number, since it is larger than the sum of its proper divisors (12379225).

51284615 is a wasteful number, since it uses less digits than its factorization.

51284615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353721.

The product of its digits is 9600, while the sum is 32.

The square root of 51284615 is about 7161.3277400214. The cubic root of 51284615 is about 371.5315503770.

The spelling of 51284615 in words is "fifty-one million, two hundred eighty-four thousand, six hundred fifteen".