155235431 has 8 divisors (see below), whose sum is σ = 170010960. Its totient is φ = 140864832.

The previous prime is 155235413. The next prime is 155235433. The reversal of 155235431 is 134532551.

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 155235431 - 2¹⁰ = 155234407 is a prime.

It is a super-2 number, since 2×155235431² = 48196078075511522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155235394 and 155235403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155235433) 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, 100430 + ... + 101963.

It is an arithmetic number, because the mean of its divisors is an integer number (21251370).

Almost surely, 2^155235431 is an apocalyptic number.

155235431 is a deficient number, since it is larger than the sum of its proper divisors (14775529).

155235431 is a wasteful number, since it uses less digits than its factorization.

155235431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202465.

The product of its digits is 9000, while the sum is 29.

The square root of 155235431 is about 12459.3511468294. The cubic root of 155235431 is about 537.4403680735.

Adding to 155235431 its reverse (134532551), we get a palindrome (289767982).

The spelling of 155235431 in words is "one hundred fifty-five million, two hundred thirty-five thousand, four hundred thirty-one".