31427249989 has 16 divisors (see below), whose sum is σ = 31971409920. Its totient is φ = 30887129520.

The previous prime is 31427249983. The next prime is 31427250037. The reversal of 31427249989 is 98994272413.

It is a cyclic number.

It is not a de Polignac number, because 31427249989 - 2³ = 31427249981 is a prime.

It is a super-2 number, since 2×31427249989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31427249981) 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, 26837374 + ... + 26838544.

It is an arithmetic number, because the mean of its divisors is an integer number (1998213120).

Almost surely, 2^31427249989 is an apocalyptic number.

It is an amenable number.

31427249989 is a deficient number, since it is larger than the sum of its proper divisors (544159931).

31427249989 is a wasteful number, since it uses less digits than its factorization.

31427249989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its digits is 7838208, while the sum is 58.

The spelling of 31427249989 in words is "thirty-one billion, four hundred twenty-seven million, two hundred forty-nine thousand, nine hundred eighty-nine".