133031511231 has 8 divisors (see below), whose sum is σ = 177379110144. Its totient is φ = 88685793240.

The previous prime is 133031511203. The next prime is 133031511241. The reversal of 133031511231 is 132115130331.

It is a happy number.

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

It is not a de Polignac number, because 133031511231 - 2⁷ = 133031511103 is a prime.

It is a super-2 number, since 2×133031511231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133031511241) 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, 295975 + ... + 594696.

It is an arithmetic number, because the mean of its divisors is an integer number (22172388768).

Almost surely, 2^133031511231 is an apocalyptic number.

133031511231 is a deficient number, since it is larger than the sum of its proper divisors (44347598913).

133031511231 is an equidigital number, since it uses as much as digits as its factorization.

133031511231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940461.

The product of its (nonzero) digits is 810, while the sum is 24.

Adding to 133031511231 its reverse (132115130331), we get a palindrome (265146641562).

The spelling of 133031511231 in words is "one hundred thirty-three billion, thirty-one million, five hundred eleven thousand, two hundred thirty-one".