133531413 has 8 divisors (see below), whose sum is σ = 188515008. Its totient is φ = 83784384.

The previous prime is 133531397. The next prime is 133531423. The reversal of 133531413 is 314135331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133531413 - 2⁴ = 133531397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133531423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1309081 + ... + 1309182.

It is an arithmetic number, because the mean of its divisors is an integer number (23564376).

Almost surely, 2^133531413 is an apocalyptic number.

It is an amenable number.

133531413 is a deficient number, since it is larger than the sum of its proper divisors (54983595).

133531413 is a wasteful number, since it uses less digits than its factorization.

133531413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618283.

The product of its digits is 1620, while the sum is 24.

The square root of 133531413 is about 11555.5793017918. The cubic root of 133531413 is about 511.1258136165.

Adding to 133531413 its reverse (314135331), we get a palindrome (447666744).

The spelling of 133531413 in words is "one hundred thirty-three million, five hundred thirty-one thousand, four hundred thirteen".