225655501 has 4 divisors (see below), whose sum is σ = 238929372. Its totient is φ = 212381632.

The previous prime is 225655487. The next prime is 225655523. The reversal of 225655501 is 105556522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 206066025 + 19589476 = 14355^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 225655501 - 2¹⁹ = 225131213 is a prime.

It is a super-2 number, since 2×225655501² = 101840810263122002, 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 (225655561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6636910 + ... + 6636943.

It is an arithmetic number, because the mean of its divisors is an integer number (59732343).

Almost surely, 2^225655501 is an apocalyptic number.

It is an amenable number.

225655501 is a deficient number, since it is larger than the sum of its proper divisors (13273871).

225655501 is a wasteful number, since it uses less digits than its factorization.

225655501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13273870.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 225655501 is about 15021.8341423409. The cubic root of 225655501 is about 608.8102771908.

The spelling of 225655501 in words is "two hundred twenty-five million, six hundred fifty-five thousand, five hundred one".