31355423 has 4 divisors (see below), whose sum is σ = 34205928. Its totient is φ = 28504920.

The previous prime is 31355413. The next prime is 31355431. The reversal of 31355423 is 32455313.

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 31355423 - 2⁴ = 31355407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31355392 and 31355401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31355413) 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, 1425236 + ... + 1425257.

It is an arithmetic number, because the mean of its divisors is an integer number (8551482).

Almost surely, 2^31355423 is an apocalyptic number.

31355423 is a deficient number, since it is larger than the sum of its proper divisors (2850505).

31355423 is a wasteful number, since it uses less digits than its factorization.

31355423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850504.

The product of its digits is 5400, while the sum is 26.

The square root of 31355423 is about 5599.5913243736. The cubic root of 31355423 is about 315.3340640023.

It can be divided in two parts, 3135 and 5423, that added together give a palindrome (8558).

The spelling of 31355423 in words is "thirty-one million, three hundred fifty-five thousand, four hundred twenty-three".