70513815 has 16 divisors (see below), whose sum is σ = 114507648. Its totient is φ = 37045536.

The previous prime is 70513789. The next prime is 70513831. The reversal of 70513815 is 51831507.

It is not a de Polignac number, because 70513815 - 2⁸ = 70513559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34077 + ... + 36086.

It is an arithmetic number, because the mean of its divisors is an integer number (7156728).

Almost surely, 2^70513815 is an apocalyptic number.

70513815 is a deficient number, since it is larger than the sum of its proper divisors (43993833).

70513815 is a wasteful number, since it uses less digits than its factorization.

70513815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70238.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 70513815 is about 8397.2504428533. The cubic root of 70513815 is about 413.1344433487.

The spelling of 70513815 in words is "seventy million, five hundred thirteen thousand, eight hundred fifteen".