131302818 has 12 divisors (see below), whose sum is σ = 284489478. Its totient is φ = 43767600.

The previous prime is 131302799. The next prime is 131302859. The reversal of 131302818 is 818203131.

It can be written as a sum of positive squares in only one way, i.e., 70509609 + 60793209 = 8397^2 + 7797^2 .

It is a super-2 number, since 2×131302818² = 34480860029482248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131302791 and 131302800.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3647283 + ... + 3647318.

Almost surely, 2^131302818 is an apocalyptic number.

131302818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131302818 is an abundant number, since it is smaller than the sum of its proper divisors (153186660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131302818 is a wasteful number, since it uses less digits than its factorization.

131302818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7294609 (or 7294606 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 131302818 is about 11458.7441720286. The cubic root of 131302818 is about 508.2663394527.

Adding to 131302818 its reverse (818203131), we get a palindrome (949505949).

The spelling of 131302818 in words is "one hundred thirty-one million, three hundred two thousand, eight hundred eighteen".