252501665 has 16 divisors (see below), whose sum is σ = 336838656. Its totient is φ = 180446400.

The previous prime is 252501649. The next prime is 252501673. The reversal of 252501665 is 566105252.

It is not a de Polignac number, because 252501665 - 2⁴ = 252501649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60641 + ... + 64670.

It is an arithmetic number, because the mean of its divisors is an integer number (21052416).

Almost surely, 2^252501665 is an apocalyptic number.

It is an amenable number.

252501665 is a deficient number, since it is larger than the sum of its proper divisors (84336991).

252501665 is a wasteful number, since it uses less digits than its factorization.

252501665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125360.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 252501665 is about 15890.3009726059. The cubic root of 252501665 is about 632.0548216945.

The spelling of 252501665 in words is "two hundred fifty-two million, five hundred one thousand, six hundred sixty-five".