61913225 has 24 divisors (see below), whose sum is σ = 84369600. Its totient is φ = 44696000.

The previous prime is 61913221. The next prime is 61913227. The reversal of 61913225 is 52231916.

It is not a de Polignac number, because 61913225 - 2² = 61913221 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61913221) 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, 40220 + ... + 41730.

It is an arithmetic number, because the mean of its divisors is an integer number (3515400).

Almost surely, 2^61913225 is an apocalyptic number.

It is an amenable number.

61913225 is a deficient number, since it is larger than the sum of its proper divisors (22456375).

61913225 is a wasteful number, since it uses less digits than its factorization.

61913225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1676 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 61913225 is about 7868.4957266303. The cubic root of 61913225 is about 395.6044263456.

The spelling of 61913225 in words is "sixty-one million, nine hundred thirteen thousand, two hundred twenty-five".