228193157931 has 16 divisors (see below), whose sum is σ = 310751728128. Its totient is φ = 148882109600.

The previous prime is 228193157921. The next prime is 228193157947. The reversal of 228193157931 is 139751391822.

It is a happy number.

228193157931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 228193157931 - 2⁶ = 228193157867 is a prime.

It is a super-2 number, since 2×228193157931² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228193157921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2511841 + ... + 2601101.

It is an arithmetic number, because the mean of its divisors is an integer number (19421983008).

Almost surely, 2^228193157931 is an apocalyptic number.

228193157931 is a deficient number, since it is larger than the sum of its proper divisors (82558570197).

228193157931 is a wasteful number, since it uses less digits than its factorization.

228193157931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107442.

The product of its digits is 816480, while the sum is 51.

The spelling of 228193157931 in words is "two hundred twenty-eight billion, one hundred ninety-three million, one hundred fifty-seven thousand, nine hundred thirty-one".