252231681 has 8 divisors (see below), whose sum is σ = 362178880. Its totient is φ = 155219472.

The previous prime is 252231673. The next prime is 252231691. The reversal of 252231681 is 186132252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252231681 - 2³ = 252231673 is a prime.

It is a super-2 number, since 2×252231681² = 127241641800171522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252231641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3233701 + ... + 3233778.

It is an arithmetic number, because the mean of its divisors is an integer number (45272360).

It is a Proth number, since it is equal to 15395 ⋅ 2¹⁴ + 1 and 15395 < 2¹⁴.

Almost surely, 2^252231681 is an apocalyptic number.

It is an amenable number.

252231681 is a deficient number, since it is larger than the sum of its proper divisors (109947199).

252231681 is a wasteful number, since it uses less digits than its factorization.

252231681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467495.

The product of its digits is 5760, while the sum is 30.

The square root of 252231681 is about 15881.8034555273. The cubic root of 252231681 is about 631.8294693258.

The spelling of 252231681 in words is "two hundred fifty-two million, two hundred thirty-one thousand, six hundred eighty-one".