225655610381 has 2 divisors, whose sum is σ = 225655610382. Its totient is φ = 225655610380.

The previous prime is 225655610371. The next prime is 225655610419. The reversal of 225655610381 is 183016556522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159576280900 + 66079329481 = 399470^2 + 257059^2 .

It is a cyclic number.

It is not a de Polignac number, because 225655610381 - 2²⁶ = 225588501517 is a prime.

It is a super-2 number, since 2×225655610381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225655610321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112827805190 + 112827805191.

It is an arithmetic number, because the mean of its divisors is an integer number (112827805191).

Almost surely, 2^225655610381 is an apocalyptic number.

It is an amenable number.

225655610381 is a deficient number, since it is larger than the sum of its proper divisors (1).

225655610381 is an equidigital number, since it uses as much as digits as its factorization.

225655610381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 225655610381 in words is "two hundred twenty-five billion, six hundred fifty-five million, six hundred ten thousand, three hundred eighty-one".