131450561 has 4 divisors (see below), whose sum is σ = 143400624. Its totient is φ = 119500500.

The previous prime is 131450521. The next prime is 131450567. The reversal of 131450561 is 165054131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165054131 = 11 ⋅15004921.

It is a cyclic number.

It is not a de Polignac number, because 131450561 - 2¹⁰ = 131449537 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 131450561.

It is not an unprimeable number, because it can be changed into a prime (131450567) 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, 5975015 + ... + 5975036.

It is an arithmetic number, because the mean of its divisors is an integer number (35850156).

Almost surely, 2^131450561 is an apocalyptic number.

131450561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131450561 is a deficient number, since it is larger than the sum of its proper divisors (11950063).

131450561 is a wasteful number, since it uses less digits than its factorization.

131450561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11950062.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 131450561 is about 11465.1890956931. The cubic root of 131450561 is about 508.4569031373.

The spelling of 131450561 in words is "one hundred thirty-one million, four hundred fifty thousand, five hundred sixty-one".