133870431 has 16 divisors (see below), whose sum is σ = 184709120. Its totient is φ = 86153760.

The previous prime is 133870411. The next prime is 133870463. The reversal of 133870431 is 134078331.

It is not a de Polignac number, because 133870431 - 2¹⁴ = 133854047 is a prime.

It is a super-2 number, since 2×133870431² = 35842584592251522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133870411) 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, 41505 + ... + 44613.

It is an arithmetic number, because the mean of its divisors is an integer number (11544320).

Almost surely, 2^133870431 is an apocalyptic number.

133870431 is a deficient number, since it is larger than the sum of its proper divisors (50838689).

133870431 is a wasteful number, since it uses less digits than its factorization.

133870431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3606.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 133870431 is about 11570.2390208673. The cubic root of 133870431 is about 511.5580075805.

The spelling of 133870431 in words is "one hundred thirty-three million, eight hundred seventy thousand, four hundred thirty-one".