2356231621 has 2 divisors, whose sum is σ = 2356231622. Its totient is φ = 2356231620.

The previous prime is 2356231607. The next prime is 2356231649. The reversal of 2356231621 is 1261326532.

It is a happy number.

2356231621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336706721 + 1019524900 = 36561^2 + 31930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2356231621 - 2¹¹ = 2356229573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2356231321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1178115810 + 1178115811.

It is an arithmetic number, because the mean of its divisors is an integer number (1178115811).

Almost surely, 2^2356231621 is an apocalyptic number.

It is an amenable number.

2356231621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2356231621 is an equidigital number, since it uses as much as digits as its factorization.

2356231621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 2356231621 is about 48541.0302836683. The cubic root of 2356231621 is about 1330.6770293776.

The spelling of 2356231621 in words is "two billion, three hundred fifty-six million, two hundred thirty-one thousand, six hundred twenty-one".