23140537 has 16 divisors (see below), whose sum is σ = 27987840. Its totient is φ = 18690048.

The previous prime is 23140531. The next prime is 23140571. The reversal of 23140537 is 73504132.

It is a cyclic number.

It is not a de Polignac number, because 23140537 - 2⁷ = 23140409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23140531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33843 + ... + 34519.

It is an arithmetic number, because the mean of its divisors is an integer number (1749240).

Almost surely, 2^23140537 is an apocalyptic number.

It is an amenable number.

23140537 is a deficient number, since it is larger than the sum of its proper divisors (4847303).

23140537 is a wasteful number, since it uses less digits than its factorization.

23140537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

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

The square root of 23140537 is about 4810.4612045000. The cubic root of 23140537 is about 284.9647519761.

Adding to 23140537 its reverse (73504132), we get a palindrome (96644669).

The spelling of 23140537 in words is "twenty-three million, one hundred forty thousand, five hundred thirty-seven".