31140020411 has 4 divisors (see below), whose sum is σ = 31141446000. Its totient is φ = 31138594824.

The previous prime is 31140020363. The next prime is 31140020437. The reversal of 31140020411 is 11402004113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31140020411 - 2¹⁰ = 31140019387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31140020411.

It is not an unprimeable number, because it can be changed into a prime (31140050411) 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, 679511 + ... + 723888.

It is an arithmetic number, because the mean of its divisors is an integer number (7785361500).

Almost surely, 2^31140020411 is an apocalyptic number.

31140020411 is a deficient number, since it is larger than the sum of its proper divisors (1425589).

31140020411 is a wasteful number, since it uses less digits than its factorization.

31140020411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425588.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31140020411 its reverse (11402004113), we get a palindrome (42542024524).

The spelling of 31140020411 in words is "thirty-one billion, one hundred forty million, twenty thousand, four hundred eleven".