155332431 has 8 divisors (see below), whose sum is σ = 230122160. Its totient is φ = 103554936.

The previous prime is 155332423. The next prime is 155332433. The reversal of 155332431 is 134233551.

155332431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155332431 - 2³ = 155332423 is a prime.

It is a super-2 number, since 2×155332431² = 48256328240739522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5753053 = 155332431 / (1 + 5 + 5 + 3 + 3 + 2 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155332395 and 155332404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155332433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2876500 + ... + 2876553.

It is an arithmetic number, because the mean of its divisors is an integer number (28765270).

Almost surely, 2^155332431 is an apocalyptic number.

155332431 is a deficient number, since it is larger than the sum of its proper divisors (74789729).

155332431 is an equidigital number, since it uses as much as digits as its factorization.

155332431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5753062 (or 5753056 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 155332431 is about 12463.2431974988. The cubic root of 155332431 is about 537.5522859539.

Adding to 155332431 its reverse (134233551), we get a palindrome (289565982).

The spelling of 155332431 in words is "one hundred fifty-five million, three hundred thirty-two thousand, four hundred thirty-one".