70216815 has 24 divisors (see below), whose sum is σ = 117457200. Its totient is φ = 35816704.

The previous prime is 70216813. The next prime is 70216843. The reversal of 70216815 is 51861207.

It is not a de Polignac number, because 70216815 - 2¹ = 70216813 is a prime.

It is a super-2 number, since 2×70216815² = 9860802217488450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70216813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3511 + ... + 12359.

It is an arithmetic number, because the mean of its divisors is an integer number (4894050).

Almost surely, 2^70216815 is an apocalyptic number.

70216815 is a deficient number, since it is larger than the sum of its proper divisors (47240385).

70216815 is a wasteful number, since it uses less digits than its factorization.

70216815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8903 (or 8880 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 70216815 is about 8379.5474221464. The cubic root of 70216815 is about 412.5535945056.

The spelling of 70216815 in words is "seventy million, two hundred sixteen thousand, eight hundred fifteen".