131511330 has 32 divisors (see below), whose sum is σ = 350697600. Its totient is φ = 35069616.

The previous prime is 131511323. The next prime is 131511377. The reversal of 131511330 is 33115131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243270 + ... + 243809.

It is an arithmetic number, because the mean of its divisors is an integer number (10959300).

Almost surely, 2^131511330 is an apocalyptic number.

131511330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131511330 is an abundant number, since it is smaller than the sum of its proper divisors (219186270).

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

131511330 is a wasteful number, since it uses less digits than its factorization.

131511330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487095 (or 487089 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 131511330 is about 11467.8389420152. The cubic root of 131511330 is about 508.5352435088.

Adding to 131511330 its reverse (33115131), we get a palindrome (164626461).

It can be divided in two parts, 131511 and 330, that added together give a triangular number (131841 = T₅₁₃).

The spelling of 131511330 in words is "one hundred thirty-one million, five hundred eleven thousand, three hundred thirty".