2311621621 has 16 divisors (see below), whose sum is σ = 2367940608. Its totient is φ = 2256105600.

The previous prime is 2311621589. The next prime is 2311621673. The reversal of 2311621621 is 1261261132.

It is a happy number.

2311621621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2311621621 - 2⁵ = 2311621589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311621421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5058025 + ... + 5058481.

It is an arithmetic number, because the mean of its divisors is an integer number (147996288).

Almost surely, 2^2311621621 is an apocalyptic number.

It is an amenable number.

2311621621 is a deficient number, since it is larger than the sum of its proper divisors (56318987).

2311621621 is a wasteful number, since it uses less digits than its factorization.

2311621621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092.

The product of its digits is 864, while the sum is 25.

The square root of 2311621621 is about 48079.3263367947. The cubic root of 2311621621 is about 1322.2256645599.

Adding to 2311621621 its reverse (1261261132), we get a palindrome (3572882753).

The spelling of 2311621621 in words is "two billion, three hundred eleven million, six hundred twenty-one thousand, six hundred twenty-one".