228972975501 has 4 divisors (see below), whose sum is σ = 305297300672. Its totient is φ = 152648650332.

The previous prime is 228972975467. The next prime is 228972975509. The reversal of 228972975501 is 105579279822.

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.

It is not a de Polignac number, because 228972975501 - 2³⁰ = 227899233677 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 (228972975509) 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, 38162162581 + ... + 38162162586.

It is an arithmetic number, because the mean of its divisors is an integer number (76324325168).

Almost surely, 2^228972975501 is an apocalyptic number.

It is an amenable number.

228972975501 is a deficient number, since it is larger than the sum of its proper divisors (76324325171).

228972975501 is an equidigital number, since it uses as much as digits as its factorization.

228972975501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76324325170.

The product of its (nonzero) digits is 6350400, while the sum is 57.

The spelling of 228972975501 in words is "two hundred twenty-eight billion, nine hundred seventy-two million, nine hundred seventy-five thousand, five hundred one".