105431031140 has 12 divisors (see below), whose sum is σ = 221405165436. Its totient is φ = 42172412448.

The previous prime is 105431031133. The next prime is 105431031143. The reversal of 105431031140 is 41130134501.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27704936704 + 77726094436 = 166448^2 + 278794^2 .

It is a super-2 number, since 2×105431031140² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105431031143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2635775759 + ... + 2635775798.

It is an arithmetic number, because the mean of its divisors is an integer number (18450430453).

Almost surely, 2^105431031140 is an apocalyptic number.

105431031140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105431031140 is an abundant number, since it is smaller than the sum of its proper divisors (115974134296).

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

105431031140 is a wasteful number, since it uses less digits than its factorization.

105431031140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271551566 (or 5271551564 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 105431031140 its reverse (41130134501), we get a palindrome (146561165641).

The spelling of 105431031140 in words is "one hundred five billion, four hundred thirty-one million, thirty-one thousand, one hundred forty".