356431 has 4 divisors (see below), whose sum is σ = 371952. Its totient is φ = 340912.

The previous prime is 356399. The next prime is 356441. The reversal of 356431 is 134653.

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 356431 - 2⁵ = 356399 is a prime.

It is a super-2 number, since 2×356431² = 254086115522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356441) 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, 7726 + ... + 7771.

It is an arithmetic number, because the mean of its divisors is an integer number (92988).

2³⁵⁶⁴³¹ is an apocalyptic number.

356431 is a deficient number, since it is larger than the sum of its proper divisors (15521).

356431 is a wasteful number, since it uses less digits than its factorization.

356431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15520.

The product of its digits is 1080, while the sum is 22.

The square root of 356431 is about 597.0184251763. The cubic root of 356431 is about 70.9020006159.

Subtracting from 356431 its sum of digits (22), we obtain a square (356409 = 597²).

It can be divided in two parts, 356 and 431, that added together give a palindrome (787).

The spelling of 356431 in words is "three hundred fifty-six thousand, four hundred thirty-one".