222400999003225 has 27 divisors (see below), whose sum is σ = 320802846973437. Its totient is φ = 152503184258880.

The previous prime is 222400999003217. The next prime is 222400999003231. The reversal of 222400999003225 is 522300999004222.

It is a happy number.

The square root of 222400999003225 is 14913115.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 11190235922761 + 211210763080464 = 3345181^2 + 14533092^2 .

It is not a de Polignac number, because 222400999003225 - 2³ = 222400999003217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 521745981 + ... + 522172069.

Almost surely, 2^{222400999003225} is an apocalyptic number.

222400999003225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

222400999003225 is the 14913115-th square number.

222400999003225 is the 7456558-th centered octagonal number.

It is an amenable number.

222400999003225 is a deficient number, since it is larger than the sum of its proper divisors (98401847970212).

222400999003225 is an frugal number, since it uses more digits than its factorization.

222400999003225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852202 (or 426101 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 49.

222400999003225 divided by its sum of digits (49) gives a square (4538795898025 = 2130445²).

The spelling of 222400999003225 in words is "two hundred twenty-two trillion, four hundred billion, nine hundred ninety-nine million, three thousand, two hundred twenty-five".