1145222631 has 80 divisors (see below), whose sum is σ = 2036362240. Its totient is φ = 627756480.

The previous prime is 1145222623. The next prime is 1145222641. The reversal of 1145222631 is 1362225411.

1145222631 is a `hidden beast` number, since 1 + 1 + 4 + 5 + 2 + 22 + 631 = 666.

It is not a de Polignac number, because 1145222631 - 2³ = 1145222623 is a prime.

It is a super-2 number, since 2×1145222631² = 2623069749109124322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145222595 and 1145222604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145222621) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1656996 + ... + 1657686.

It is an arithmetic number, because the mean of its divisors is an integer number (25454528).

Almost surely, 2^1145222631 is an apocalyptic number.

1145222631 is a deficient number, since it is larger than the sum of its proper divisors (891139609).

1145222631 is an equidigital number, since it uses as much as digits as its factorization.

1145222631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 817 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1145222631 is about 33841.1381457539. The cubic root of 1145222631 is about 1046.2367570683.

The spelling of 1145222631 in words is "one billion, one hundred forty-five million, two hundred twenty-two thousand, six hundred thirty-one".