612155224 has 64 divisors (see below), whose sum is σ = 1254211200. Its totient is φ = 279127296.

The previous prime is 612155221. The next prime is 612155273. The reversal of 612155224 is 422551216.

It is a junction number, because it is equal to n+sod(n) for n = 612155192 and 612155201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612155221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476487 + ... + 477769.

It is an arithmetic number, because the mean of its divisors is an integer number (19597050).

Almost surely, 2^612155224 is an apocalyptic number.

It is an amenable number.

612155224 is an abundant number, since it is smaller than the sum of its proper divisors (642055976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612155224 is a wasteful number, since it uses less digits than its factorization.

612155224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 1420 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 612155224 is about 24741.7708339561. The cubic root of 612155224 is about 849.0902487900.

The spelling of 612155224 in words is "six hundred twelve million, one hundred fifty-five thousand, two hundred twenty-four".