133437131 has 4 divisors (see below), whose sum is σ = 141286392. Its totient is φ = 125587872.

The previous prime is 133437103. The next prime is 133437137. The reversal of 133437131 is 131734331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131734331 = 139 ⋅947729.

It is a cyclic number.

It is not a de Polignac number, because 133437131 - 2¹⁴ = 133420747 is a prime.

It is a super-2 number, since 2×133437131² = 35610935859022322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133437131.

It is not an unprimeable number, because it can be changed into a prime (133437137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3924605 + ... + 3924638.

It is an arithmetic number, because the mean of its divisors is an integer number (35321598).

Almost surely, 2^133437131 is an apocalyptic number.

133437131 is a deficient number, since it is larger than the sum of its proper divisors (7849261).

133437131 is an equidigital number, since it uses as much as digits as its factorization.

133437131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7849260.

The product of its digits is 2268, while the sum is 26.

The square root of 133437131 is about 11551.4990802060. The cubic root of 133437131 is about 511.0054890949.

The spelling of 133437131 in words is "one hundred thirty-three million, four hundred thirty-seven thousand, one hundred thirty-one".