225515401 has 4 divisors (see below), whose sum is σ = 225545472. Its totient is φ = 225485332.

The previous prime is 225515377. The next prime is 225515429. The reversal of 225515401 is 104515522.

225515401 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 225515401 - 2⁵ = 225515369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225515431) 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, 6420 + ... + 22186.

It is an arithmetic number, because the mean of its divisors is an integer number (56386368).

Almost surely, 2^225515401 is an apocalyptic number.

It is an amenable number.

225515401 is a deficient number, since it is larger than the sum of its proper divisors (30071).

225515401 is a wasteful number, since it uses less digits than its factorization.

225515401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30070.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 225515401 is about 15017.1702061340. The cubic root of 225515401 is about 608.6842562172.

The spelling of 225515401 in words is "two hundred twenty-five million, five hundred fifteen thousand, four hundred one".