225570537 has 24 divisors (see below), whose sum is σ = 335633480. Its totient is φ = 145877760.

The previous prime is 225570533. The next prime is 225570547. The reversal of 225570537 is 735075522.

It is a happy number.

225570537 is a `hidden beast` number, since 2 + 2 + 55 + 70 + 537 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 67716441 + 157854096 = 8229^2 + 12564^2 .

It is not a de Polignac number, because 225570537 - 2² = 225570533 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225570533) 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, 139389 + ... + 140997.

Almost surely, 2^225570537 is an apocalyptic number.

It is an amenable number.

225570537 is a deficient number, since it is larger than the sum of its proper divisors (110062943).

225570537 is a wasteful number, since it uses less digits than its factorization.

225570537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 36.

The square root of 225570537 is about 15019.0058592438. The cubic root of 225570537 is about 608.7338576788.

The spelling of 225570537 in words is "two hundred twenty-five million, five hundred seventy thousand, five hundred thirty-seven".