23731481 has 2 divisors, whose sum is σ = 23731482. Its totient is φ = 23731480.

The previous prime is 23731459. The next prime is 23731493. The reversal of 23731481 is 18413732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22477081 + 1254400 = 4741^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 23731481 - 2⁶ = 23731417 is a prime.

It is a super-2 number, since 2×23731481² = 1126366380906722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23731451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11865740 + 11865741.

It is an arithmetic number, because the mean of its divisors is an integer number (11865741).

Almost surely, 2^23731481 is an apocalyptic number.

It is an amenable number.

23731481 is a deficient number, since it is larger than the sum of its proper divisors (1).

23731481 is an equidigital number, since it uses as much as digits as its factorization.

23731481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 23731481 is about 4871.4967925680. The cubic root of 23731481 is about 287.3701230640.

The spelling of 23731481 in words is "twenty-three million, seven hundred thirty-one thousand, four hundred eighty-one".