2131156001 has 4 divisors (see below), whose sum is σ = 2295091092. Its totient is φ = 1967220912.

The previous prime is 2131155967. The next prime is 2131156003. The reversal of 2131156001 is 1006511312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 838681600 + 1292474401 = 28960^2 + 35951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131156001 - 2²⁶ = 2064047137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131156003) 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, 81967526 + ... + 81967551.

It is an arithmetic number, because the mean of its divisors is an integer number (573772773).

Almost surely, 2^2131156001 is an apocalyptic number.

It is an amenable number.

2131156001 is a deficient number, since it is larger than the sum of its proper divisors (163935091).

2131156001 is a wasteful number, since it uses less digits than its factorization.

2131156001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163935090.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2131156001 is about 46164.4452040745. The cubic root of 2131156001 is about 1286.8810738819.

Adding to 2131156001 its reverse (1006511312), we get a palindrome (3137667313).

The spelling of 2131156001 in words is "two billion, one hundred thirty-one million, one hundred fifty-six thousand, one".