252147664 has 10 divisors (see below), whose sum is σ = 488536130. Its totient is φ = 126073824.

The previous prime is 252147647. The next prime is 252147677. The reversal of 252147664 is 466741252.

It can be written as a sum of positive squares in only one way, i.e., 204261264 + 47886400 = 14292^2 + 6920^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7879599 + ... + 7879630.

It is an arithmetic number, because the mean of its divisors is an integer number (48853613).

Almost surely, 2^252147664 is an apocalyptic number.

It is an amenable number.

252147664 is a deficient number, since it is larger than the sum of its proper divisors (236388466).

252147664 is a wasteful number, since it uses less digits than its factorization.

252147664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15759237 (or 15759231 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 252147664 is about 15879.1581640841. The cubic root of 252147664 is about 631.7593085494.

The spelling of 252147664 in words is "two hundred fifty-two million, one hundred forty-seven thousand, six hundred sixty-four".