2331617021 has 2 divisors, whose sum is σ = 2331617022. Its totient is φ = 2331617020.

The previous prime is 2331617009. The next prime is 2331617137. The reversal of 2331617021 is 1207161332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203396100 + 1128220921 = 34690^2 + 33589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2331617021 - 2⁶ = 2331616957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331617521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165808510 + 1165808511.

It is an arithmetic number, because the mean of its divisors is an integer number (1165808511).

Almost surely, 2^2331617021 is an apocalyptic number.

It is an amenable number.

2331617021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331617021 is an equidigital number, since it uses as much as digits as its factorization.

2331617021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2331617021 is about 48286.8203653958. The cubic root of 2331617021 is about 1326.0271178652.

Adding to 2331617021 its reverse (1207161332), we get a palindrome (3538778353).

The spelling of 2331617021 in words is "two billion, three hundred thirty-one million, six hundred seventeen thousand, twenty-one".