252191226 has 96 divisors (see below), whose sum is σ = 622448640. Its totient is φ = 66703104.

The previous prime is 252191213. The next prime is 252191249. The reversal of 252191226 is 622191252.

252191226 = T₈₄₈₅ + T₈₄₈₆ + ... + T₈₄₉₁.

It is a junction number, because it is equal to n+sod(n) for n = 252191193 and 252191202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 958771 + ... + 959033.

It is an arithmetic number, because the mean of its divisors is an integer number (6483840).

Almost surely, 2^252191226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252191226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311224320).

252191226 is an abundant number, since it is smaller than the sum of its proper divisors (370257414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252191226 is a wasteful number, since it uses less digits than its factorization.

252191226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 371 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 252191226 is about 15880.5297770572. The cubic root of 252191226 is about 631.7956881770.

The spelling of 252191226 in words is "two hundred fifty-two million, one hundred ninety-one thousand, two hundred twenty-six".