131433331 has 16 divisors (see below), whose sum is σ = 137592000. Its totient is φ = 125452800.

The previous prime is 131433329. The next prime is 131433353. The reversal of 131433331 is 133334131.

It is a cyclic number.

It is not a de Polignac number, because 131433331 - 2¹ = 131433329 is a prime.

It is a super-2 number, since 2×131433331² = 34549440995511122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131433311) 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, 660370 + ... + 660568.

It is an arithmetic number, because the mean of its divisors is an integer number (8599500).

Almost surely, 2^131433331 is an apocalyptic number.

131433331 is a deficient number, since it is larger than the sum of its proper divisors (6158669).

131433331 is a wasteful number, since it uses less digits than its factorization.

131433331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510.

The product of its digits is 972, while the sum is 22.

The square root of 131433331 is about 11464.4376661047. The cubic root of 131433331 is about 508.4346866853.

Adding to 131433331 its reverse (133334131), we get a palindrome (264767462).

The spelling of 131433331 in words is "one hundred thirty-one million, four hundred thirty-three thousand, three hundred thirty-one".