162243091 has 4 divisors (see below), whose sum is σ = 162270112. Its totient is φ = 162216072.

The previous prime is 162243089. The next prime is 162243101. The reversal of 162243091 is 190342261.

162243091 is a nontrivial binomial coefficient, being equal to C(18014, 2).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190342261 = 2617 ⋅72733.

It is a 3-Lehmer number, since φ(162243091) divides (162243091-1)³.

It is a cyclic number.

It is not a de Polignac number, because 162243091 - 2¹ = 162243089 is a prime.

It is a deceptive number, since it divides R_162243090.

It is not an unprimeable number, because it can be changed into a prime (162243031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 18013.

It is an arithmetic number, because the mean of its divisors is an integer number (40567528).

Almost surely, 2^162243091 is an apocalyptic number.

162243091 is the 18013-rd triangular number and also the 9007-th hexagonal number.

162243091 is the 6005-th centered nonagonal number.

162243091 is a deficient number, since it is larger than the sum of its proper divisors (27021).

162243091 is an equidigital number, since it uses as much as digits as its factorization.

162243091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27020.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 162243091 is about 12737.4679979971. The cubic root of 162243091 is about 545.4087117388.

It can be divided in two parts, 162 and 243091, that added together give a triangular number (243253 = T₆₉₇).

The spelling of 162243091 in words is "one hundred sixty-two million, two hundred forty-three thousand, ninety-one".