2116261157 has 4 divisors (see below), whose sum is σ = 2119360320. Its totient is φ = 2113161996.

The previous prime is 2116261153. The next prime is 2116261171. The reversal of 2116261157 is 7511626112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2116261157 - 2² = 2116261153 is a prime.

It is a super-2 number, since 2×2116261157² = 8957122569253957298, 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 (2116261153) 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, 1548557 + ... + 1549922.

It is an arithmetic number, because the mean of its divisors is an integer number (529840080).

Almost surely, 2^2116261157 is an apocalyptic number.

It is an amenable number.

2116261157 is a deficient number, since it is larger than the sum of its proper divisors (3099163).

2116261157 is an equidigital number, since it uses as much as digits as its factorization.

2116261157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099162.

The product of its digits is 5040, while the sum is 32.

The square root of 2116261157 is about 46002.8385754618. The cubic root of 2116261157 is about 1283.8760189697.

Adding to 2116261157 its reverse (7511626112), we get a palindrome (9627887269).

The spelling of 2116261157 in words is "two billion, one hundred sixteen million, two hundred sixty-one thousand, one hundred fifty-seven".