51670715 has 4 divisors (see below), whose sum is σ = 62004864. Its totient is φ = 41336568.

The previous prime is 51670699. The next prime is 51670753. The reversal of 51670715 is 51707615.

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 51670715 - 2⁴ = 51670699 is a prime.

It is a super-2 number, since 2×51670715² = 5339725577222450, 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, 5167067 + ... + 5167076.

It is an arithmetic number, because the mean of its divisors is an integer number (15501216).

Almost surely, 2^51670715 is an apocalyptic number.

51670715 is a deficient number, since it is larger than the sum of its proper divisors (10334149).

51670715 is a wasteful number, since it uses less digits than its factorization.

51670715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334148.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 51670715 is about 7188.2344842110. The cubic root of 51670715 is about 372.4615878593.

The spelling of 51670715 in words is "fifty-one million, six hundred seventy thousand, seven hundred fifteen".