131022501 has 4 divisors (see below), whose sum is σ = 174696672. Its totient is φ = 87348332.

The previous prime is 131022487. The next prime is 131022503. The reversal of 131022501 is 105220131.

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: 105220131 = 3 ⋅35073377.

It is a cyclic number.

It is not a de Polignac number, because 131022501 - 2¹³ = 131014309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131022503) 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, 21837081 + ... + 21837086.

It is an arithmetic number, because the mean of its divisors is an integer number (43674168).

Almost surely, 2^131022501 is an apocalyptic number.

It is an amenable number.

131022501 is a deficient number, since it is larger than the sum of its proper divisors (43674171).

131022501 is an equidigital number, since it uses as much as digits as its factorization.

131022501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43674170.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 131022501 is about 11446.5060608030. The cubic root of 131022501 is about 507.9043842715.

Adding to 131022501 its reverse (105220131), we get a palindrome (236242632).

The spelling of 131022501 in words is "one hundred thirty-one million, twenty-two thousand, five hundred one".