155530316231 has 4 divisors (see below), whose sum is σ = 155533499472. Its totient is φ = 155527132992.

The previous prime is 155530316209. The next prime is 155530316239. The reversal of 155530316231 is 132613035551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132613035551 = 6803 ⋅19493317.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155530316231 is a prime.

It is a super-2 number, since 2×155530316231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155530316191 and 155530316200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155530316239) 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, 1517171 + ... + 1616436.

It is an arithmetic number, because the mean of its divisors is an integer number (38883374868).

Almost surely, 2^155530316231 is an apocalyptic number.

155530316231 is a deficient number, since it is larger than the sum of its proper divisors (3183241).

155530316231 is an equidigital number, since it uses as much as digits as its factorization.

155530316231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183240.

The product of its (nonzero) digits is 40500, while the sum is 35.

The spelling of 155530316231 in words is "one hundred fifty-five billion, five hundred thirty million, three hundred sixteen thousand, two hundred thirty-one".