252180101 has 4 divisors (see below), whose sum is σ = 256454400. Its totient is φ = 247905804.

The previous prime is 252180043. The next prime is 252180107. The reversal of 252180101 is 101081252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252180101 - 2⁶ = 252180037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252180107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2137061 + ... + 2137178.

It is an arithmetic number, because the mean of its divisors is an integer number (64113600).

Almost surely, 2^252180101 is an apocalyptic number.

It is an amenable number.

252180101 is a deficient number, since it is larger than the sum of its proper divisors (4274299).

252180101 is an equidigital number, since it uses as much as digits as its factorization.

252180101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274298.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 252180101 is about 15880.1795015044. The cubic root of 252180101 is about 631.7863978321.

The spelling of 252180101 in words is "two hundred fifty-two million, one hundred eighty thousand, one hundred one".