225121031 has 4 divisors (see below), whose sum is σ = 226063200. Its totient is φ = 224178864.

The previous prime is 225121027. The next prime is 225121067. The reversal of 225121031 is 130121522.

It is a happy number.

225121031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130121522 = 2 ⋅65060761.

It is a cyclic number.

It is not a de Polignac number, because 225121031 - 2² = 225121027 is a prime.

It is a super-2 number, since 2×225121031² = 101358957197005922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225121081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470726 + ... + 471203.

It is an arithmetic number, because the mean of its divisors is an integer number (56515800).

Almost surely, 2^225121031 is an apocalyptic number.

225121031 is a deficient number, since it is larger than the sum of its proper divisors (942169).

225121031 is an equidigital number, since it uses as much as digits as its factorization.

225121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942168.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 225121031 is about 15004.0338242754. The cubic root of 225121031 is about 608.3292370442.

Adding to 225121031 its reverse (130121522), we get a palindrome (355242553).

The spelling of 225121031 in words is "two hundred twenty-five million, one hundred twenty-one thousand, thirty-one".