70321518 has 12 divisors (see below), whose sum is σ = 152363328. Its totient is φ = 23440500.

The previous prime is 70321487. The next prime is 70321523. The reversal of 70321518 is 81512307.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 70321491 and 70321500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1953358 + ... + 1953393.

It is an arithmetic number, because the mean of its divisors is an integer number (12696944).

Almost surely, 2^70321518 is an apocalyptic number.

70321518 is an abundant number, since it is smaller than the sum of its proper divisors (82041810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70321518 is a wasteful number, since it uses less digits than its factorization.

70321518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906759 (or 3906756 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 70321518 is about 8385.7926280108. The cubic root of 70321518 is about 412.7585508567.

The spelling of 70321518 in words is "seventy million, three hundred twenty-one thousand, five hundred eighteen".