31442400011 has 4 divisors (see below), whose sum is σ = 34300800024. Its totient is φ = 28584000000.

The previous prime is 31442399999. The next prime is 31442400023. The reversal of 31442400011 is 11000424413.

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

It is an interprime number because it is at equal distance from previous prime (31442399999) and next prime (31442400023).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31442400011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31442405011) 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, 1429199990 + ... + 1429200011.

It is an arithmetic number, because the mean of its divisors is an integer number (8575200006).

Almost surely, 2^31442400011 is an apocalyptic number.

31442400011 is a deficient number, since it is larger than the sum of its proper divisors (2858400013).

31442400011 is a wasteful number, since it uses less digits than its factorization.

31442400011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858400012.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31442400011 its reverse (11000424413), we get a palindrome (42442824424).

The spelling of 31442400011 in words is "thirty-one billion, four hundred forty-two million, four hundred thousand, eleven".