131159645 has 8 divisors (see below), whose sum is σ = 158191704. Its totient is φ = 104394304.

The previous prime is 131159599. The next prime is 131159653. The reversal of 131159645 is 546951131.

It can be written as a sum of positive squares in 4 ways, for example, as 12545764 + 118613881 = 3542^2 + 10891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131159645 - 2¹⁴ = 131143261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65594 + ... + 67563.

It is an arithmetic number, because the mean of its divisors is an integer number (19773963).

Almost surely, 2^131159645 is an apocalyptic number.

It is an amenable number.

131159645 is a deficient number, since it is larger than the sum of its proper divisors (27032059).

131159645 is a wasteful number, since it uses less digits than its factorization.

131159645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133359.

The product of its digits is 16200, while the sum is 35.

The square root of 131159645 is about 11452.4951429809. The cubic root of 131159645 is about 508.0815338679.

The spelling of 131159645 in words is "one hundred thirty-one million, one hundred fifty-nine thousand, six hundred forty-five".