155522401532431 has 4 divisors (see below), whose sum is σ = 155545610373864. Its totient is φ = 155499192691000.

The previous prime is 155522401532357. The next prime is 155522401532471. The reversal of 155522401532431 is 134235104225551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155522401532431 - 2¹¹ = 155522401530383 is a prime.

It is a super-2 number, since 2×155522401532431² (a number of 29 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 (155522401532471) 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, 11604410665 + ... + 11604424066.

It is an arithmetic number, because the mean of its divisors is an integer number (38886402593466).

Almost surely, 2^{155522401532431} is an apocalyptic number.

155522401532431 is a deficient number, since it is larger than the sum of its proper divisors (23208841433).

155522401532431 is an equidigital number, since it uses as much as digits as its factorization.

155522401532431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23208841432.

The product of its (nonzero) digits is 720000, while the sum is 43.

Adding to 155522401532431 its reverse (134235104225551), we get a palindrome (289757505757982).

The spelling of 155522401532431 in words is "one hundred fifty-five trillion, five hundred twenty-two billion, four hundred one million, five hundred thirty-two thousand, four hundred thirty-one".