252226521 has 32 divisors (see below), whose sum is σ = 390153600. Its totient is φ = 160885440.

The previous prime is 252226517. The next prime is 252226549. The reversal of 252226521 is 125622252.

252226521 is a `hidden beast` number, since 2 + 5 + 2 + 2 + 2 + 652 + 1 = 666.

It is not a de Polignac number, because 252226521 - 2² = 252226517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (252226511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58870 + ... + 63008.

It is an arithmetic number, because the mean of its divisors is an integer number (12192300).

Almost surely, 2^252226521 is an apocalyptic number.

It is an amenable number.

252226521 is a deficient number, since it is larger than the sum of its proper divisors (137927079).

252226521 is a wasteful number, since it uses less digits than its factorization.

252226521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246 (or 4240 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 252226521 is about 15881.6410046317. The cubic root of 252226521 is about 631.8251607707.

Adding to 252226521 its reverse (125622252), we get a palindrome (377848773).

The spelling of 252226521 in words is "two hundred fifty-two million, two hundred twenty-six thousand, five hundred twenty-one".