2236457921 has 2 divisors, whose sum is σ = 2236457922. Its totient is φ = 2236457920.

The previous prime is 2236457903. The next prime is 2236457957. The reversal of 2236457921 is 1297546322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2027250625 + 209207296 = 45025^2 + 14464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2236457921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2236457981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1118228960 + 1118228961.

It is an arithmetic number, because the mean of its divisors is an integer number (1118228961).

Almost surely, 2^2236457921 is an apocalyptic number.

It is an amenable number.

2236457921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2236457921 is an equidigital number, since it uses as much as digits as its factorization.

2236457921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 2236457921 is about 47291.2034209323. The cubic root of 2236457921 is about 1307.7364950411.

The spelling of 2236457921 in words is "two billion, two hundred thirty-six million, four hundred fifty-seven thousand, nine hundred twenty-one".