23140357 has 2 divisors, whose sum is σ = 23140358. Its totient is φ = 23140356.

The previous prime is 23140319. The next prime is 23140379. The reversal of 23140357 is 75304132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22791076 + 349281 = 4774^2 + 591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23140357 is a prime.

It is a super-2 number, since 2×23140357² = 1070952244174898, which contains 22 as substring.

It is equal to p_1456513 and since 23140357 and 1456513 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23140657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11570178 + 11570179.

It is an arithmetic number, because the mean of its divisors is an integer number (11570179).

Almost surely, 2^23140357 is an apocalyptic number.

It is an amenable number.

23140357 is a deficient number, since it is larger than the sum of its proper divisors (1).

23140357 is an equidigital number, since it uses as much as digits as its factorization.

23140357 is an evil number, because the sum of its binary digits is even.

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

The square root of 23140357 is about 4810.4424952389. The cubic root of 23140357 is about 284.9640131026.

Adding to 23140357 its reverse (75304132), we get a palindrome (98444489).

The spelling of 23140357 in words is "twenty-three million, one hundred forty thousand, three hundred fifty-seven".