252519861 has 72 divisors (see below), whose sum is σ = 408627072. Its totient is φ = 138441600.

The previous prime is 252519859. The next prime is 252519901. The reversal of 252519861 is 168915252.

It is not a de Polignac number, because 252519861 - 2¹ = 252519859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252519811) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5372740 + ... + 5372786.

It is an arithmetic number, because the mean of its divisors is an integer number (5675376).

Almost surely, 2^252519861 is an apocalyptic number.

It is an amenable number.

252519861 is a deficient number, since it is larger than the sum of its proper divisors (156107211).

252519861 is a wasteful number, since it uses less digits than its factorization.

252519861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 121 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 252519861 is about 15890.8735128060. The cubic root of 252519861 is about 632.0700038958.

The spelling of 252519861 in words is "two hundred fifty-two million, five hundred nineteen thousand, eight hundred sixty-one".