133712720431 has 16 divisors (see below), whose sum is σ = 141898932000. Its totient is φ = 125562498048.

The previous prime is 133712720423. The next prime is 133712720473. The reversal of 133712720431 is 134027217331.

It is a cyclic number.

It is not a de Polignac number, because 133712720431 - 2³ = 133712720423 is a prime.

It is a super-2 number, since 2×133712720431² (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 (133712720411) 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, 14771995 + ... + 14781043.

It is an arithmetic number, because the mean of its divisors is an integer number (8868683250).

Almost surely, 2^133712720431 is an apocalyptic number.

133712720431 is a deficient number, since it is larger than the sum of its proper divisors (8186211569).

133712720431 is a wasteful number, since it uses less digits than its factorization.

133712720431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10938.

The product of its (nonzero) digits is 21168, while the sum is 34.

Adding to 133712720431 its reverse (134027217331), we get a palindrome (267739937762).

The spelling of 133712720431 in words is "one hundred thirty-three billion, seven hundred twelve million, seven hundred twenty thousand, four hundred thirty-one".