133244440431 has 16 divisors (see below), whose sum is σ = 183458689920. Its totient is φ = 85967814240.

The previous prime is 133244440409. The next prime is 133244440477. The reversal of 133244440431 is 134044442331.

It is not a de Polignac number, because 133244440431 - 2⁹ = 133244439919 is a prime.

It is a super-2 number, since 2×133244440431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133244440392 and 133244440401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133244440831) 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, 4724025 + ... + 4752146.

It is an arithmetic number, because the mean of its divisors is an integer number (11466168120).

Almost surely, 2^133244440431 is an apocalyptic number.

133244440431 is a deficient number, since it is larger than the sum of its proper divisors (50214249489).

133244440431 is a wasteful number, since it uses less digits than its factorization.

133244440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9476326.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 133244440431 its reverse (134044442331), we get a palindrome (267288882762).

The spelling of 133244440431 in words is "one hundred thirty-three billion, two hundred forty-four million, four hundred forty thousand, four hundred thirty-one".