612525220 has 12 divisors (see below), whose sum is σ = 1286303004. Its totient is φ = 245010080.

The previous prime is 612525209. The next prime is 612525257. The reversal of 612525220 is 22525216.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 426257316 + 186267904 = 20646^2 + 13648^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15313111 + ... + 15313150.

It is an arithmetic number, because the mean of its divisors is an integer number (107191917).

Almost surely, 2^612525220 is an apocalyptic number.

It is an amenable number.

612525220 is an abundant number, since it is smaller than the sum of its proper divisors (673777784).

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

612525220 is a wasteful number, since it uses less digits than its factorization.

612525220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30626270 (or 30626268 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 612525220 is about 24749.2468572278. The cubic root of 612525220 is about 849.2612820565.

The spelling of 612525220 in words is "six hundred twelve million, five hundred twenty-five thousand, two hundred twenty".