1145565631 has 8 divisors (see below), whose sum is σ = 1315424384. Its totient is φ = 977258520.

The previous prime is 1145565611. The next prime is 1145565667. The reversal of 1145565631 is 1365655411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1145565631 - 2⁷ = 1145565503 is a prime.

It is a super-2 number, since 2×1145565631² = 2624641229856856322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145565611) 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, 386325 + ... + 389278.

It is an arithmetic number, because the mean of its divisors is an integer number (164428048).

Almost surely, 2^1145565631 is an apocalyptic number.

1145565631 is a deficient number, since it is larger than the sum of its proper divisors (169858753).

1145565631 is an equidigital number, since it uses as much as digits as its factorization.

1145565631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775821.

The product of its digits is 54000, while the sum is 37.

The square root of 1145565631 is about 33846.2055628101. The cubic root of 1145565631 is about 1046.3411977180.

The spelling of 1145565631 in words is "one billion, one hundred forty-five million, five hundred sixty-five thousand, six hundred thirty-one".