2131620511 has 4 divisors (see below), whose sum is σ = 2134855800. Its totient is φ = 2128385224.

The previous prime is 2131620503. The next prime is 2131620521. The reversal of 2131620511 is 1150261312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2131620511 - 2³ = 2131620503 is a prime.

It is a super-2 number, since 2×2131620511² = 9087612005831802242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131620521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616656 + ... + 1617973.

It is an arithmetic number, because the mean of its divisors is an integer number (533713950).

Almost surely, 2^2131620511 is an apocalyptic number.

2131620511 is a deficient number, since it is larger than the sum of its proper divisors (3235289).

2131620511 is an equidigital number, since it uses as much as digits as its factorization.

2131620511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235288.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2131620511 is about 46169.4759662702. The cubic root of 2131620511 is about 1286.9745639412.

Adding to 2131620511 its reverse (1150261312), we get a palindrome (3281881823).

The spelling of 2131620511 in words is "two billion, one hundred thirty-one million, six hundred twenty thousand, five hundred eleven".