31421999999 has 16 divisors (see below), whose sum is σ = 35495276544. Its totient is φ = 27598533600.

The previous prime is 31421999981. The next prime is 31422000007. The reversal of 31421999999 is 99999912413.

It is a cyclic number.

It is not a de Polignac number, because 31421999999 - 2¹⁶ = 31421934463 is a prime.

31421999999 is a modest number, since divided by 999999 gives 31421 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421996999) 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, 217997 + ... + 332214.

It is an arithmetic number, because the mean of its divisors is an integer number (2218454784).

Almost surely, 2^31421999999 is an apocalyptic number.

31421999999 is a deficient number, since it is larger than the sum of its proper divisors (4073276545).

31421999999 is a wasteful number, since it uses less digits than its factorization.

31421999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550438.

The product of its digits is 12754584, while the sum is 65.

The spelling of 31421999999 in words is "thirty-one billion, four hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".