225233402421 has 16 divisors (see below), whose sum is σ = 324174015360. Its totient is φ = 138674437440.

The previous prime is 225233402413. The next prime is 225233402473. The reversal of 225233402421 is 124204332522.

It is not a de Polignac number, because 225233402421 - 2³ = 225233402413 is a prime.

It is a super-2 number, since 2×225233402421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225233402411) 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, 56278210 + ... + 56282211.

It is an arithmetic number, because the mean of its divisors is an integer number (20260875960).

Almost surely, 2^225233402421 is an apocalyptic number.

It is an amenable number.

225233402421 is a deficient number, since it is larger than the sum of its proper divisors (98940612939).

225233402421 is a wasteful number, since it uses less digits than its factorization.

225233402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112560476.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 225233402421 its reverse (124204332522), we get a palindrome (349437734943).

The spelling of 225233402421 in words is "two hundred twenty-five billion, two hundred thirty-three million, four hundred two thousand, four hundred twenty-one".