131403855 has 16 divisors (see below), whose sum is σ = 229359744. Its totient is φ = 63710880.

The previous prime is 131403851. The next prime is 131403859. The reversal of 131403855 is 558304131.

It is an interprime number because it is at equal distance from previous prime (131403851) and next prime (131403859).

It is not a de Polignac number, because 131403855 - 2² = 131403851 is a prime.

It is a super-2 number, since 2×131403855² = 34533946217722050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131403851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398029 + ... + 398358.

It is an arithmetic number, because the mean of its divisors is an integer number (14334984).

Almost surely, 2^131403855 is an apocalyptic number.

131403855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131403855 is a deficient number, since it is larger than the sum of its proper divisors (97955889).

131403855 is a wasteful number, since it uses less digits than its factorization.

131403855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796406.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 131403855 is about 11463.1520534275. The cubic root of 131403855 is about 508.3966756745.

Adding to 131403855 its reverse (558304131), we get a palindrome (689707986).

The spelling of 131403855 in words is "one hundred thirty-one million, four hundred three thousand, eight hundred fifty-five".