23071257 has 16 divisors (see below), whose sum is σ = 37287360. Its totient is φ = 13982400.

The previous prime is 23071247. The next prime is 23071273. The reversal of 23071257 is 75217032.

It is not a de Polignac number, because 23071257 - 2⁴ = 23071241 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23071257.

It is not an unprimeable number, because it can be changed into a prime (23071247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38544 + ... + 39137.

It is an arithmetic number, because the mean of its divisors is an integer number (2330460).

Almost surely, 2^23071257 is an apocalyptic number.

23071257 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

23071257 is a deficient number, since it is larger than the sum of its proper divisors (14216103).

23071257 is a wasteful number, since it uses less digits than its factorization.

23071257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77701 (or 77695 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 23071257 is about 4803.2548339642. The cubic root of 23071257 is about 284.6800842386.

Adding to 23071257 its reverse (75217032), we get a palindrome (98288289).

The spelling of 23071257 in words is "twenty-three million, seventy-one thousand, two hundred fifty-seven".