131223554 has 16 divisors (see below), whose sum is σ = 245405376. Its totient is φ = 51126000.

The previous prime is 131223551. The next prime is 131223563. The reversal of 131223554 is 455322131.

It is a happy number.

It is a super-2 number, since 2×131223554² = 34439242248781832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131223551) 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, 425897 + ... + 426204.

It is an arithmetic number, because the mean of its divisors is an integer number (15337836).

Almost surely, 2^131223554 is an apocalyptic number.

131223554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

131223554 is a deficient number, since it is larger than the sum of its proper divisors (114181822).

131223554 is a wasteful number, since it uses less digits than its factorization.

131223554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852121.

The product of its digits is 3600, while the sum is 26.

The square root of 131223554 is about 11455.2849811779. The cubic root of 131223554 is about 508.1640432663.

Adding to 131223554 its reverse (455322131), we get a palindrome (586545685).

The spelling of 131223554 in words is "one hundred thirty-one million, two hundred twenty-three thousand, five hundred fifty-four".