23211857 has 2 divisors, whose sum is σ = 23211858. Its totient is φ = 23211856.

The previous prime is 23211829. The next prime is 23211869. The reversal of 23211857 is 75811232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16008001 + 7203856 = 4001^2 + 2684^2 .

It is a cyclic number.

It is not a de Polignac number, because 23211857 - 2¹² = 23207761 is a prime.

It is not a weakly prime, because it can be changed into another prime (23211257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11605928 + 11605929.

It is an arithmetic number, because the mean of its divisors is an integer number (11605929).

Almost surely, 2^23211857 is an apocalyptic number.

It is an amenable number.

23211857 is a deficient number, since it is larger than the sum of its proper divisors (1).

23211857 is an equidigital number, since it uses as much as digits as its factorization.

23211857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 23211857 is about 4817.8685121120. The cubic root of 23211857 is about 285.2572090661.

The spelling of 23211857 in words is "twenty-three million, two hundred eleven thousand, eight hundred fifty-seven".