31000135525636 has 12 divisors (see below), whose sum is σ = 54279609265728. Its totient is φ = 15491675735432.

The previous prime is 31000135525633. The next prime is 31000135525657. The reversal of 31000135525636 is 63652553100013.

It is a super-2 number, since 2×31000135525636² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31000135525633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2097998536 + ... + 2098013311.

It is an arithmetic number, because the mean of its divisors is an integer number (4523300772144).

Almost surely, 2^{31000135525636} is an apocalyptic number.

It is an amenable number.

31000135525636 is a deficient number, since it is larger than the sum of its proper divisors (23279473740092).

31000135525636 is a wasteful number, since it uses less digits than its factorization.

31000135525636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196013698 (or 4196013696 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 40.

Adding to 31000135525636 its reverse (63652553100013), we get a palindrome (94652688625649).

The spelling of 31000135525636 in words is "thirty-one trillion, one hundred thirty-five million, five hundred twenty-five thousand, six hundred thirty-six".