225347321557 has 4 divisors (see below), whose sum is σ = 225359685580. Its totient is φ = 225334957536.

The previous prime is 225347321543. The next prime is 225347321569. The reversal of 225347321557 is 755123743522.

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 679853476 + 224667468081 = 26074^2 + 473991^2 .

It is a cyclic number.

It is not a de Polignac number, because 225347321557 - 2³¹ = 223199837909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225347321597) 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, 6154632 + ... + 6191137.

It is an arithmetic number, because the mean of its divisors is an integer number (56339921395).

Almost surely, 2^225347321557 is an apocalyptic number.

It is an amenable number.

225347321557 is a deficient number, since it is larger than the sum of its proper divisors (12364023).

225347321557 is a wasteful number, since it uses less digits than its factorization.

225347321557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12364022.

The product of its digits is 1764000, while the sum is 46.

The spelling of 225347321557 in words is "two hundred twenty-five billion, three hundred forty-seven million, three hundred twenty-one thousand, five hundred fifty-seven".