155340431 has 8 divisors (see below), whose sum is σ = 160387584. Its totient is φ = 150353280.

The previous prime is 155340391. The next prime is 155340463. The reversal of 155340431 is 134043551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155340431 - 2¹⁴ = 155324047 is a prime.

It is a super-2 number, since 2×155340431² = 48261299006531522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155340431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155340481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9710 + ... + 20123.

It is an arithmetic number, because the mean of its divisors is an integer number (20048448).

Almost surely, 2^155340431 is an apocalyptic number.

155340431 is a deficient number, since it is larger than the sum of its proper divisors (5047153).

155340431 is a wasteful number, since it uses less digits than its factorization.

155340431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30001.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 155340431 is about 12463.5641371158. The cubic root of 155340431 is about 537.5615142145.

Adding to 155340431 its reverse (134043551), we get a palindrome (289383982).

The spelling of 155340431 in words is "one hundred fifty-five million, three hundred forty thousand, four hundred thirty-one".