165151243 has 8 divisors (see below), whose sum is σ = 174983760. Its totient is φ = 155331840.

The previous prime is 165151237. The next prime is 165151253. The reversal of 165151243 is 342151561.

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

It is a cyclic number.

It is not a de Polignac number, because 165151243 - 2²¹ = 163054091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165151253) 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, 36648 + ... + 40906.

It is an arithmetic number, because the mean of its divisors is an integer number (21872970).

Almost surely, 2^165151243 is an apocalyptic number.

165151243 is a deficient number, since it is larger than the sum of its proper divisors (9832517).

165151243 is a wasteful number, since it uses less digits than its factorization.

165151243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557.

The product of its digits is 3600, while the sum is 28.

The square root of 165151243 is about 12851.1183560031. The cubic root of 165151243 is about 548.6481876206.

The spelling of 165151243 in words is "one hundred sixty-five million, one hundred fifty-one thousand, two hundred forty-three".