225122440 has 16 divisors (see below), whose sum is σ = 506525580. Its totient is φ = 90048960.

The previous prime is 225122407. The next prime is 225122473. The reversal of 225122440 is 44221522.

It is an interprime number because it is at equal distance from previous prime (225122407) and next prime (225122473).

It can be written as a sum of positive squares in 2 ways, for example, as 218862436 + 6260004 = 14794^2 + 2502^2 .

It is a super-2 number, since 2×225122440² = 101360225983107200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2813991 + ... + 2814070.

Almost surely, 2^225122440 is an apocalyptic number.

225122440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225122440 is an abundant number, since it is smaller than the sum of its proper divisors (281403140).

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

225122440 is a wasteful number, since it uses less digits than its factorization.

225122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628072 (or 5628068 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 225122440 is about 15004.0807782416. The cubic root of 225122440 is about 608.3305061898.

Adding to 225122440 its reverse (44221522), we get a palindrome (269343962).

The spelling of 225122440 in words is "two hundred twenty-five million, one hundred twenty-two thousand, four hundred forty".