1105251631987 has 4 divisors (see below), whose sum is σ = 1105273776880. Its totient is φ = 1105229487096.

The previous prime is 1105251631951. The next prime is 1105251632033. The reversal of 1105251631987 is 7891361525011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1105251631987 - 2³⁹ = 555495818099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1105251631987.

It is not an unprimeable number, because it can be changed into a prime (1105251631907) 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, 10997412 + ... + 11097457.

It is an arithmetic number, because the mean of its divisors is an integer number (276318444220).

Almost surely, 2^{1105251631987} is an apocalyptic number.

1105251631987 is a deficient number, since it is larger than the sum of its proper divisors (22144893).

1105251631987 is an equidigital number, since it uses as much as digits as its factorization.

1105251631987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22144892.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 1105251631987 in words is "one trillion, one hundred five billion, two hundred fifty-one million, six hundred thirty-one thousand, nine hundred eighty-seven".