23551601 has 2 divisors, whose sum is σ = 23551602. Its totient is φ = 23551600.

The previous prime is 23551531. The next prime is 23551603. The reversal of 23551601 is 10615532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17181025 + 6370576 = 4145^2 + 2524^2 .

It is a cyclic number.

It is not a de Polignac number, because 23551601 - 2¹⁴ = 23535217 is a prime.

Together with 23551603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23551603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11775800 + 11775801.

It is an arithmetic number, because the mean of its divisors is an integer number (11775801).

Almost surely, 2^23551601 is an apocalyptic number.

It is an amenable number.

23551601 is a deficient number, since it is larger than the sum of its proper divisors (1).

23551601 is an equidigital number, since it uses as much as digits as its factorization.

23551601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 23551601 is about 4852.9991757675. Note that the first 3 decimals coincide. The cubic root of 23551601 is about 286.6422109718.

The spelling of 23551601 in words is "twenty-three million, five hundred fifty-one thousand, six hundred one".