613215872 has 16 divisors (see below), whose sum is σ = 1221641250. Its totient is φ = 306607872.

The previous prime is 613215839. The next prime is 613215877. The reversal of 613215872 is 278512316.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 605947456 + 7268416 = 24616^2 + 2696^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (613215877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2395247 + ... + 2395502.

Almost surely, 2^613215872 is an apocalyptic number.

It is an amenable number.

613215872 is a deficient number, since it is larger than the sum of its proper divisors (608425378).

613215872 is an equidigital number, since it uses as much as digits as its factorization.

613215872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790763 (or 4790751 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 613215872 is about 24763.1959165210. The cubic root of 613215872 is about 849.5803566401.

The spelling of 613215872 in words is "six hundred thirteen million, two hundred fifteen thousand, eight hundred seventy-two".