31120023 has 8 divisors (see below), whose sum is σ = 45265536. Its totient is φ = 18860600.

The previous prime is 31120009. The next prime is 31120027. The reversal of 31120023 is 32002113.

It is a happy number.

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

It is not a de Polignac number, because 31120023 - 2¹⁰ = 31118999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31119990 and 31120008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120027) 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, 471483 + ... + 471548.

It is an arithmetic number, because the mean of its divisors is an integer number (5658192).

Almost surely, 2^31120023 is an apocalyptic number.

31120023 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31120023 is a deficient number, since it is larger than the sum of its proper divisors (14145513).

31120023 is a wasteful number, since it uses less digits than its factorization.

31120023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943045.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31120023 is about 5578.5323338670. The cubic root of 31120023 is about 314.5429602716.

Adding to 31120023 its reverse (32002113), we get a palindrome (63122136).

The spelling of 31120023 in words is "thirty-one million, one hundred twenty thousand, twenty-three".