2156011507 has 4 divisors (see below), whose sum is σ = 2321858560. Its totient is φ = 1990164456.

The previous prime is 2156011483. The next prime is 2156011523. The reversal of 2156011507 is 7051106512.

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 2156011507 - 2²³ = 2147622899 is a prime.

It is a super-2 number, since 2×2156011507² = 9296771236632822098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156051507) 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, 82923507 + ... + 82923532.

It is an arithmetic number, because the mean of its divisors is an integer number (580464640).

Almost surely, 2^2156011507 is an apocalyptic number.

2156011507 is a deficient number, since it is larger than the sum of its proper divisors (165847053).

2156011507 is a wasteful number, since it uses less digits than its factorization.

2156011507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165847052.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 2156011507 is about 46432.8709752046. The cubic root of 2156011507 is about 1291.8646804874.

The spelling of 2156011507 in words is "two billion, one hundred fifty-six million, eleven thousand, five hundred seven".