31012141440 has 128 divisors (see below), whose sum is σ = 112972849920. Its totient is φ = 7088486400.

The previous prime is 31012141439. The next prime is 31012141441. The reversal of 31012141440 is 4414121013.

It is an interprime number because it is at equal distance from previous prime (31012141439) and next prime (31012141441).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012141441) 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, 1140286 + ... + 1167165.

It is an arithmetic number, because the mean of its divisors is an integer number (882600390).

Almost surely, 2^31012141440 is an apocalyptic number.

31012141440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31012141440 is an abundant number, since it is smaller than the sum of its proper divisors (81960708480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31012141440 is a wasteful number, since it uses less digits than its factorization.

31012141440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307480 (or 2307468 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 31012141440 its reverse (4414121013), we get a palindrome (35426262453).

The spelling of 31012141440 in words is "thirty-one billion, twelve million, one hundred forty-one thousand, four hundred forty".