131652221 has 4 divisors (see below), whose sum is σ = 131739744. Its totient is φ = 131564700.

The previous prime is 131652211. The next prime is 131652229. The reversal of 131652221 is 122256131.

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.

It is a cyclic number.

It is not a de Polignac number, because 131652221 - 2²² = 127457917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131652229) 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, 41465 + ... + 44526.

It is an arithmetic number, because the mean of its divisors is an integer number (32934936).

Almost surely, 2^131652221 is an apocalyptic number.

It is an amenable number.

131652221 is a deficient number, since it is larger than the sum of its proper divisors (87523).

131652221 is an equidigital number, since it uses as much as digits as its factorization.

131652221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87522.

The product of its digits is 720, while the sum is 23.

The square root of 131652221 is about 11473.9801725469. The cubic root of 131652221 is about 508.7167803852.

The spelling of 131652221 in words is "one hundred thirty-one million, six hundred fifty-two thousand, two hundred twenty-one".