613221425 has 12 divisors (see below), whose sum is σ = 761283120. Its totient is φ = 490003920.

The previous prime is 613221407. The next prime is 613221431. The reversal of 613221425 is 524122316.

It is a happy number.

It is not a de Polignac number, because 613221425 - 2²⁴ = 596444209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 613221394 and 613221403.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8186 + ... + 35964.

It is an arithmetic number, because the mean of its divisors is an integer number (63440260).

Almost surely, 2^613221425 is an apocalyptic number.

It is an amenable number.

613221425 is a deficient number, since it is larger than the sum of its proper divisors (148061695).

613221425 is a wasteful number, since it uses less digits than its factorization.

613221425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28672 (or 28667 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 613221425 is about 24763.3080383054. The cubic root of 613221425 is about 849.5829211016.

The spelling of 613221425 in words is "six hundred thirteen million, two hundred twenty-one thousand, four hundred twenty-five".