155423550231 has 6 divisors (see below), whose sum is σ = 224500683680. Its totient is φ = 103615700148.

The previous prime is 155423550193. The next prime is 155423550257. The reversal of 155423550231 is 132055324551.

155423550231 is a `hidden beast` number, since 1 + 5 + 54 + 23 + 550 + 2 + 31 = 666.

It is not a de Polignac number, because 155423550231 - 2⁹ = 155423549719 is a prime.

It is a super-2 number, since 2×155423550231² (a number of 23 digits) 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 (155423550281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8634641671 + ... + 8634641688.

Almost surely, 2^155423550231 is an apocalyptic number.

155423550231 is a deficient number, since it is larger than the sum of its proper divisors (69077133449).

155423550231 is a wasteful number, since it uses less digits than its factorization.

155423550231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17269283365 (or 17269283362 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 155423550231 its reverse (132055324551), we get a palindrome (287478874782).

The spelling of 155423550231 in words is "one hundred fifty-five billion, four hundred twenty-three million, five hundred fifty thousand, two hundred thirty-one".