23021031 has 16 divisors (see below), whose sum is σ = 33821568. Its totient is φ = 13812000.

The previous prime is 23021029. The next prime is 23021057. The reversal of 23021031 is 13012032.

It is a happy number.

It is not a de Polignac number, because 23021031 - 2¹ = 23021029 is a prime.

It is a super-2 number, since 2×23021031² = 1059935736605922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23020998 and 23021016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121 + ... + 6786.

It is an arithmetic number, because the mean of its divisors is an integer number (2113848).

Almost surely, 2^23021031 is an apocalyptic number.

23021031 is a deficient number, since it is larger than the sum of its proper divisors (10800537).

23021031 is a wasteful number, since it uses less digits than its factorization.

23021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022.

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

The square root of 23021031 is about 4798.0236556316. The cubic root of 23021031 is about 284.4733518199.

Adding to 23021031 its reverse (13012032), we get a palindrome (36033063).

It can be divided in two parts, 2302 and 1031, that added together give a palindrome (3333).

The spelling of 23021031 in words is "twenty-three million, twenty-one thousand, thirty-one".