131022551 has 12 divisors (see below), whose sum is σ = 148986600. Its totient is φ = 115001040.

The previous prime is 131022547. The next prime is 131022581. The reversal of 131022551 is 155220131.

It is a happy number.

It is not a de Polignac number, because 131022551 - 2² = 131022547 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 (131022581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15161 + ... + 22178.

It is an arithmetic number, because the mean of its divisors is an integer number (12415550).

Almost surely, 2^131022551 is an apocalyptic number.

131022551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131022551 is a deficient number, since it is larger than the sum of its proper divisors (17964049).

131022551 is a wasteful number, since it uses less digits than its factorization.

131022551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37390 (or 37379 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 131022551 is about 11446.5082448754. The cubic root of 131022551 is about 507.9044488793.

Adding to 131022551 its reverse (155220131), we get a palindrome (286242682).

The spelling of 131022551 in words is "one hundred thirty-one million, twenty-two thousand, five hundred fifty-one".