131773541 has 4 divisors (see below), whose sum is σ = 133578732. Its totient is φ = 129968352.

The previous prime is 131773519. The next prime is 131773553. The reversal of 131773541 is 145377131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145377131 = 3697 ⋅39323.

It can be written as a sum of positive squares in 2 ways, for example, as 83192641 + 48580900 = 9121^2 + 6970^2 .

It is a cyclic number.

It is not a de Polignac number, because 131773541 - 2¹⁸ = 131511397 is a prime.

It is a super-2 number, since 2×131773541² = 34728532215357362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131773498 and 131773507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131773561) 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, 902486 + ... + 902631.

It is an arithmetic number, because the mean of its divisors is an integer number (33394683).

Almost surely, 2^131773541 is an apocalyptic number.

It is an amenable number.

131773541 is a deficient number, since it is larger than the sum of its proper divisors (1805191).

131773541 is an equidigital number, since it uses as much as digits as its factorization.

131773541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805190.

The product of its digits is 8820, while the sum is 32.

The square root of 131773541 is about 11479.2656995123. The cubic root of 131773541 is about 508.8729964396.

The spelling of 131773541 in words is "one hundred thirty-one million, seven hundred seventy-three thousand, five hundred forty-one".