131422381 has 2 divisors, whose sum is σ = 131422382. Its totient is φ = 131422380.

The previous prime is 131422363. The next prime is 131422453. The reversal of 131422381 is 183224131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97199881 + 34222500 = 9859^2 + 5850^2 .

It is an emirp because it is prime and its reverse (183224131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131422381 - 2⁹ = 131421869 is a prime.

It is a super-2 number, since 2×131422381² = 34543684455418322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131422301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65711190 + 65711191.

It is an arithmetic number, because the mean of its divisors is an integer number (65711191).

Almost surely, 2^131422381 is an apocalyptic number.

It is an amenable number.

131422381 is a deficient number, since it is larger than the sum of its proper divisors (1).

131422381 is an equidigital number, since it uses as much as digits as its factorization.

131422381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 131422381 is about 11463.9600923939. The cubic root of 131422381 is about 508.4205666890.

The spelling of 131422381 in words is "one hundred thirty-one million, four hundred twenty-two thousand, three hundred eighty-one".