31040221140 has 48 divisors (see below), whose sum is σ = 96569578560. Its totient is φ = 8277392160.

The previous prime is 31040221129. The next prime is 31040221151. The reversal of 31040221140 is 4112204013.

31040221140 is a `hidden beast` number, since 3 + 10 + 402 + 211 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (31040221129) and next prime (31040221151).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28740406 + ... + 28741485.

It is an arithmetic number, because the mean of its divisors is an integer number (2011866220).

Almost surely, 2^31040221140 is an apocalyptic number.

31040221140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31040221140 is an abundant number, since it is smaller than the sum of its proper divisors (65529357420).

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

31040221140 is a wasteful number, since it uses less digits than its factorization.

31040221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57481909 (or 57481901 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31040221140 its reverse (4112204013), we get a palindrome (35152425153).

The spelling of 31040221140 in words is "thirty-one billion, forty million, two hundred twenty-one thousand, one hundred forty".