131822551 has 8 divisors (see below), whose sum is σ = 158583680. Its totient is φ = 107043768.

The previous prime is 131822531. The next prime is 131822599. The reversal of 131822551 is 155228131.

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 131822551 - 2⁵ = 131822519 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 (131822521) 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, 495441 + ... + 495706.

It is an arithmetic number, because the mean of its divisors is an integer number (19822960).

Almost surely, 2^131822551 is an apocalyptic number.

131822551 is a deficient number, since it is larger than the sum of its proper divisors (26761129).

131822551 is an equidigital number, since it uses as much as digits as its factorization.

131822551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991173.

The product of its digits is 2400, while the sum is 28.

The square root of 131822551 is about 11481.4002194854. The cubic root of 131822551 is about 508.9360763115.

The spelling of 131822551 in words is "one hundred thirty-one million, eight hundred twenty-two thousand, five hundred fifty-one".