2131051501 has 4 divisors (see below), whose sum is σ = 2135973532. Its totient is φ = 2126129472.

The previous prime is 2131051493. The next prime is 2131051529. The reversal of 2131051501 is 1051501312.

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 1037162025 + 1093889476 = 32205^2 + 33074^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131051501 - 2³ = 2131051493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131051561) 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, 2460366 + ... + 2461231.

It is an arithmetic number, because the mean of its divisors is an integer number (533993383).

Almost surely, 2^2131051501 is an apocalyptic number.

It is an amenable number.

2131051501 is a deficient number, since it is larger than the sum of its proper divisors (4922031).

2131051501 is an equidigital number, since it uses as much as digits as its factorization.

2131051501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4922030.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 2131051501 is about 46163.3133667851. The cubic root of 2131051501 is about 1286.8600397154.

Adding to 2131051501 its reverse (1051501312), we get a palindrome (3182552813).

The spelling of 2131051501 in words is "two billion, one hundred thirty-one million, fifty-one thousand, five hundred one".