165542453 has 2 divisors, whose sum is σ = 165542454. Its totient is φ = 165542452.

The previous prime is 165542417. The next prime is 165542537. The reversal of 165542453 is 354245561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135094129 + 30448324 = 11623^2 + 5518^2 .

It is a cyclic number.

It is not a de Polignac number, because 165542453 - 2⁸ = 165542197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165545453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82771226 + 82771227.

It is an arithmetic number, because the mean of its divisors is an integer number (82771227).

Almost surely, 2^165542453 is an apocalyptic number.

It is an amenable number.

165542453 is a deficient number, since it is larger than the sum of its proper divisors (1).

165542453 is an equidigital number, since it uses as much as digits as its factorization.

165542453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 35.

The square root of 165542453 is about 12866.3302071725. The cubic root of 165542453 is about 549.0810583220.

The spelling of 165542453 in words is "one hundred sixty-five million, five hundred forty-two thousand, four hundred fifty-three".