23047531 has 16 divisors (see below), whose sum is σ = 25772544. Its totient is φ = 20474784.

The previous prime is 23047511. The next prime is 23047543. The reversal of 23047531 is 13574032.

It is a cyclic number.

It is not a de Polignac number, because 23047531 - 2⁵ = 23047499 is a prime.

It is a super-2 number, since 2×23047531² = 1062377370391922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23047496 and 23047505.

It is not an unprimeable number, because it can be changed into a prime (23047501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40656 + ... + 41218.

It is an arithmetic number, because the mean of its divisors is an integer number (1610784).

Almost surely, 2^23047531 is an apocalyptic number.

23047531 is a deficient number, since it is larger than the sum of its proper divisors (2725013).

23047531 is a wasteful number, since it uses less digits than its factorization.

23047531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 23047531 is about 4800.7844150722. The cubic root of 23047531 is about 284.5824644118.

The spelling of 23047531 in words is "twenty-three million, forty-seven thousand, five hundred thirty-one".