131220023 has 12 divisors (see below), whose sum is σ = 151827480. Its totient is φ = 113010480.

The previous prime is 131220017. The next prime is 131220029. The reversal of 131220023 is 320022131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131220017) and next prime (131220029).

It is not a de Polignac number, because 131220023 - 2¹² = 131215927 is a prime.

It is a super-2 number, since 2×131220023² = 34437388872241058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220029) 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, 26240 + ... + 30837.

It is an arithmetic number, because the mean of its divisors is an integer number (12652290).

Almost surely, 2^131220023 is an apocalyptic number.

131220023 is a deficient number, since it is larger than the sum of its proper divisors (20607457).

131220023 is a wasteful number, since it uses less digits than its factorization.

131220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57118 (or 57107 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 131220023 is about 11455.1308591391. The cubic root of 131220023 is about 508.1594852855.

Adding to 131220023 its reverse (320022131), we get a palindrome (451242154).

The spelling of 131220023 in words is "one hundred thirty-one million, two hundred twenty thousand, twenty-three".