23148531 has 24 divisors (see below), whose sum is σ = 39895440. Its totient is φ = 13226976.

The previous prime is 23148523. The next prime is 23148533. The reversal of 23148531 is 13584132.

It is a happy number.

It is not a de Polignac number, because 23148531 - 2³ = 23148523 is a prime.

It is a super-2 number, since 2×23148531² = 1071708974915922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 23148495 and 23148504.

It is not an unprimeable number, because it can be changed into a prime (23148533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7426 + ... + 10071.

It is an arithmetic number, because the mean of its divisors is an integer number (1662310).

Almost surely, 2^23148531 is an apocalyptic number.

23148531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23148531 is a deficient number, since it is larger than the sum of its proper divisors (16746909).

23148531 is a wasteful number, since it uses less digits than its factorization.

23148531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17520 (or 17507 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 23148531 is about 4811.2920302139. The cubic root of 23148531 is about 284.9975623060.

The spelling of 23148531 in words is "twenty-three million, one hundred forty-eight thousand, five hundred thirty-one".