131561546 has 4 divisors (see below), whose sum is σ = 197342322. Its totient is φ = 65780772.

The previous prime is 131561539. The next prime is 131561581. The reversal of 131561546 is 645165131.

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

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 207025 = 11461^2 + 455^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32890385 + ... + 32890388.

Almost surely, 2^131561546 is an apocalyptic number.

131561546 is a deficient number, since it is larger than the sum of its proper divisors (65780776).

131561546 is an equidigital number, since it uses as much as digits as its factorization.

131561546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65780775.

The product of its digits is 10800, while the sum is 32.

The square root of 131561546 is about 11470.0281603839. The cubic root of 131561546 is about 508.5999612691.

The spelling of 131561546 in words is "one hundred thirty-one million, five hundred sixty-one thousand, five hundred forty-six".