31133023 has 8 divisors (see below), whose sum is σ = 31635968. Its totient is φ = 30633984.

The previous prime is 31133017. The next prime is 31133027. The reversal of 31133023 is 32033113.

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 31133023 - 2¹⁷ = 31001951 is a prime.

It is a super-2 number, since 2×31133023² = 1938530242237058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31132988 and 31133006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31133027) 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, 17890 + ... + 19552.

It is an arithmetic number, because the mean of its divisors is an integer number (3954496).

Almost surely, 2^31133023 is an apocalyptic number.

31133023 is a deficient number, since it is larger than the sum of its proper divisors (502945).

31133023 is a wasteful number, since it uses less digits than its factorization.

31133023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 31133023 is about 5579.6973932284. The cubic root of 31133023 is about 314.5867529688.

Adding to 31133023 its reverse (32033113), we get a palindrome (63166136).

The spelling of 31133023 in words is "thirty-one million, one hundred thirty-three thousand, twenty-three".