31290423 has 8 divisors (see below), whose sum is σ = 41847936. Its totient is φ = 20796600.

The previous prime is 31290409. The next prime is 31290437. The reversal of 31290423 is 32409213.

It is an interprime number because it is at equal distance from previous prime (31290409) and next prime (31290437).

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

It is not a de Polignac number, because 31290423 - 2⁸ = 31290167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31290393 and 31290402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31290403) 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, 14763 + ... + 16748.

It is an arithmetic number, because the mean of its divisors is an integer number (5230992).

Almost surely, 2^31290423 is an apocalyptic number.

31290423 is a deficient number, since it is larger than the sum of its proper divisors (10557513).

31290423 is a wasteful number, since it uses less digits than its factorization.

31290423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31845.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31290423 is about 5593.7843183305. The cubic root of 31290423 is about 315.1160167258.

Adding to 31290423 its reverse (32409213), we get a palindrome (63699636).

It can be divided in two parts, 31290 and 423, that added together give a palindrome (31713).

The spelling of 31290423 in words is "thirty-one million, two hundred ninety thousand, four hundred twenty-three".