2115622631 has 4 divisors (see below), whose sum is σ = 2125109952. Its totient is φ = 2106135312.

The previous prime is 2115622577. The next prime is 2115622643. The reversal of 2115622631 is 1362265112.

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 2115622631 - 2⁶ = 2115622567 is a prime.

It is a super-2 number, since 2×2115622631² = 8951718233598724322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2115622594 and 2115622603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115622031) 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, 4743326 + ... + 4743771.

It is an arithmetic number, because the mean of its divisors is an integer number (531277488).

Almost surely, 2^2115622631 is an apocalyptic number.

2115622631 is a deficient number, since it is larger than the sum of its proper divisors (9487321).

2115622631 is an equidigital number, since it uses as much as digits as its factorization.

2115622631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9487320.

The product of its digits is 4320, while the sum is 29.

The square root of 2115622631 is about 45995.8979801460. The cubic root of 2115622631 is about 1283.7468807362.

Adding to 2115622631 its reverse (1362265112), we get a palindrome (3477887743).

The spelling of 2115622631 in words is "two billion, one hundred fifteen million, six hundred twenty-two thousand, six hundred thirty-one".