1164521554231 has 4 divisors (see below), whose sum is σ = 1330881776272. Its totient is φ = 998161332192.

The previous prime is 1164521554219. The next prime is 1164521554243. The reversal of 1164521554231 is 1324551254611.

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

It is an interprime number because it is at equal distance from previous prime (1164521554219) and next prime (1164521554243).

It is a cyclic number.

It is not a de Polignac number, because 1164521554231 - 2¹⁹ = 1164521029943 is a prime.

It is a super-2 number, since 2×1164521554231² (a number of 25 digits) 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 (1164521554331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83180111010 + ... + 83180111023.

It is an arithmetic number, because the mean of its divisors is an integer number (332720444068).

Almost surely, 2^{1164521554231} is an apocalyptic number.

1164521554231 is a deficient number, since it is larger than the sum of its proper divisors (166360222041).

1164521554231 is an equidigital number, since it uses as much as digits as its factorization.

1164521554231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166360222040.

The product of its digits is 144000, while the sum is 40.

The spelling of 1164521554231 in words is "one trillion, one hundred sixty-four billion, five hundred twenty-one million, five hundred fifty-four thousand, two hundred thirty-one".