23151031 has 2 divisors, whose sum is σ = 23151032. Its totient is φ = 23151030.

The previous prime is 23150999. The next prime is 23151047. The reversal of 23151031 is 13015132.

It is an a-pointer prime, because the next prime (23151047) can be obtained adding 23151031 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23151031 - 2⁵ = 23150999 is a prime.

It is a super-2 number, since 2×23151031² = 1071940472725922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23150996 and 23151014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23151061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11575515 + 11575516.

It is an arithmetic number, because the mean of its divisors is an integer number (11575516).

Almost surely, 2^23151031 is an apocalyptic number.

23151031 is a deficient number, since it is larger than the sum of its proper divisors (1).

23151031 is an equidigital number, since it uses as much as digits as its factorization.

23151031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 23151031 is about 4811.5518286723. The cubic root of 23151031 is about 285.0078216793.

Adding to 23151031 its reverse (13015132), we get a palindrome (36166163).

The spelling of 23151031 in words is "twenty-three million, one hundred fifty-one thousand, thirty-one".