252221890 has 32 divisors (see below), whose sum is σ = 471453696. Its totient is φ = 97049280.

The previous prime is 252221869. The next prime is 252221899. The reversal of 252221890 is 98122252.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (252221899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51279 + ... + 55981.

It is an arithmetic number, because the mean of its divisors is an integer number (14732928).

Almost surely, 2^252221890 is an apocalyptic number.

252221890 is a deficient number, since it is larger than the sum of its proper divisors (219231806).

252221890 is a wasteful number, since it uses less digits than its factorization.

252221890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 252221890 is about 15881.4952066863. The cubic root of 252221890 is about 631.8212938759.

The spelling of 252221890 in words is "two hundred fifty-two million, two hundred twenty-one thousand, eight hundred ninety".