131263541 has 4 divisors (see below), whose sum is σ = 135789900. Its totient is φ = 126737184.

The previous prime is 131263537. The next prime is 131263543. The reversal of 131263541 is 145362131.

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 23726641 + 107536900 = 4871^2 + 10370^2 .

It is a cyclic number.

It is not a de Polignac number, because 131263541 - 2² = 131263537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131263541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131263543) 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, 2263136 + ... + 2263193.

It is an arithmetic number, because the mean of its divisors is an integer number (33947475).

Almost surely, 2^131263541 is an apocalyptic number.

It is an amenable number.

131263541 is a deficient number, since it is larger than the sum of its proper divisors (4526359).

131263541 is an equidigital number, since it uses as much as digits as its factorization.

131263541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526358.

The product of its digits is 2160, while the sum is 26.

The square root of 131263541 is about 11457.0301998380. The cubic root of 131263541 is about 508.2156546611.

The spelling of 131263541 in words is "one hundred thirty-one million, two hundred sixty-three thousand, five hundred forty-one".