612155225 has 12 divisors (see below), whose sum is σ = 828079440. Its totient is φ = 445203600.

The previous prime is 612155221. The next prime is 612155273. The reversal of 612155225 is 522551216.

It is not a de Polignac number, because 612155225 - 2² = 612155221 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 (612155221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1112735 + ... + 1113284.

It is an arithmetic number, because the mean of its divisors is an integer number (69006620).

Almost surely, 2^612155225 is an apocalyptic number.

It is an amenable number.

612155225 is a deficient number, since it is larger than the sum of its proper divisors (215924215).

612155225 is a wasteful number, since it uses less digits than its factorization.

612155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226040 (or 2226035 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 612155225 is about 24741.7708541648. The cubic root of 612155225 is about 849.0902492524.

The spelling of 612155225 in words is "six hundred twelve million, one hundred fifty-five thousand, two hundred twenty-five".