133244013231 has 32 divisors (see below), whose sum is σ = 228316408320. Its totient is φ = 75222084672.

The previous prime is 133244013211. The next prime is 133244013251. The reversal of 133244013231 is 132310442331.

It is a happy number.

133244013231 is a `hidden beast` number, since 1 + 3 + 3 + 24 + 401 + 3 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (133244013211) and next prime (133244013251).

It is not a de Polignac number, because 133244013231 - 2³⁰ = 132170271407 is a prime.

It is a super-2 number, since 2×133244013231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 133244013195 and 133244013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133244013211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4231270 + ... + 4262643.

It is an arithmetic number, because the mean of its divisors is an integer number (7134887760).

Almost surely, 2^133244013231 is an apocalyptic number.

133244013231 is a deficient number, since it is larger than the sum of its proper divisors (95072395089).

133244013231 is an equidigital number, since it uses as much as digits as its factorization.

133244013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8494012 (or 8494006 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 133244013231 its reverse (132310442331), we get a palindrome (265554455562).

The spelling of 133244013231 in words is "one hundred thirty-three billion, two hundred forty-four million, thirteen thousand, two hundred thirty-one".