131563021 has 8 divisors (see below), whose sum is σ = 132473504. Its totient is φ = 130656240.

The previous prime is 131563007. The next prime is 131563037. The reversal of 131563021 is 120365131.

It is a happy number.

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 131563021 - 2⁵ = 131562989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131562983 and 131563001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131563321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111766 + ... + 112936.

It is an arithmetic number, because the mean of its divisors is an integer number (16559188).

Almost surely, 2^131563021 is an apocalyptic number.

It is an amenable number.

131563021 is a deficient number, since it is larger than the sum of its proper divisors (910483).

131563021 is a wasteful number, since it uses less digits than its factorization.

131563021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131563021 is about 11470.0924582150. The cubic root of 131563021 is about 508.6018619819.

The spelling of 131563021 in words is "one hundred thirty-one million, five hundred sixty-three thousand, twenty-one".