70531865 has 8 divisors (see below), whose sum is σ = 84689160. Its totient is φ = 56391552.

The previous prime is 70531837. The next prime is 70531873. The reversal of 70531865 is 56813507.

It can be written as a sum of positive squares in 4 ways, for example, as 1708249 + 68823616 = 1307^2 + 8296^2 .

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 70531865 - 2⁶ = 70531801 is a prime.

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, 8237 + ... + 14453.

It is an arithmetic number, because the mean of its divisors is an integer number (10586145).

Almost surely, 2^70531865 is an apocalyptic number.

It is an amenable number.

70531865 is a deficient number, since it is larger than the sum of its proper divisors (14157295).

70531865 is a wasteful number, since it uses less digits than its factorization.

70531865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 70531865 is about 8398.3251306436. The cubic root of 70531865 is about 413.1696914794.

The spelling of 70531865 in words is "seventy million, five hundred thirty-one thousand, eight hundred sixty-five".