31401351351 has 24 divisors (see below), whose sum is σ = 48180026960. Its totient is φ = 20212349472.

The previous prime is 31401351329. The next prime is 31401351413. The reversal of 31401351351 is 15315310413.

It is a happy number.

31401351351 is a `hidden beast` number, since 3 + 140 + 1 + 3 + 513 + 5 + 1 = 666.

It is not a de Polignac number, because 31401351351 - 2²¹ = 31399254199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401351251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 668740 + ... + 714153.

Almost surely, 2^31401351351 is an apocalyptic number.

31401351351 is a deficient number, since it is larger than the sum of its proper divisors (16778675609).

31401351351 is a wasteful number, since it uses less digits than its factorization.

31401351351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382960 (or 1382925 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 31401351351 its reverse (15315310413), we get a palindrome (46716661764).

The spelling of 31401351351 in words is "thirty-one billion, four hundred one million, three hundred fifty-one thousand, three hundred fifty-one".