31143132430140 has 24 divisors (see below), whose sum is σ = 87200770804560. Its totient is φ = 8304835314688.

The previous prime is 31143132430103. The next prime is 31143132430147. The reversal of 31143132430140 is 4103423134113.

It is a super-2 number, since 2×31143132430140² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31143132430098 and 31143132430107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143132430147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259526103525 + ... + 259526103644.

It is an arithmetic number, because the mean of its divisors is an integer number (3633365450190).

Almost surely, 2^{31143132430140} is an apocalyptic number.

31143132430140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31143132430140 is an abundant number, since it is smaller than the sum of its proper divisors (56057638374420).

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

31143132430140 is a wasteful number, since it uses less digits than its factorization.

31143132430140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519052207181 (or 519052207179 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 31143132430140 its reverse (4103423134113), we get a palindrome (35246555564253).

The spelling of 31143132430140 in words is "thirty-one trillion, one hundred forty-three billion, one hundred thirty-two million, four hundred thirty thousand, one hundred forty".