23431381 has 8 divisors (see below), whose sum is σ = 24585728. Its totient is φ = 22302000.

The previous prime is 23431379. The next prime is 23431399. The reversal of 23431381 is 18313432.

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 23431381 - 2¹ = 23431379 is a prime.

It is a super-2 number, since 2×23431381² = 1098059231134322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23431301) 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, 4305 + ... + 8086.

It is an arithmetic number, because the mean of its divisors is an integer number (3073216).

Almost surely, 2^23431381 is an apocalyptic number.

It is an amenable number.

23431381 is a deficient number, since it is larger than the sum of its proper divisors (1154347).

23431381 is a wasteful number, since it uses less digits than its factorization.

23431381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12483.

The product of its digits is 1728, while the sum is 25.

The square root of 23431381 is about 4840.5971739032. The cubic root of 23431381 is about 286.1536535588.

The spelling of 23431381 in words is "twenty-three million, four hundred thirty-one thousand, three hundred eighty-one".