165135424 has 14 divisors (see below), whose sum is σ = 327690734. Its totient is φ = 82567680.

The previous prime is 165135407. The next prime is 165135431. The reversal of 165135424 is 424531561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 143233024 + 21902400 = 11968^2 + 4680^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290057 + ... + 1290184.

It is an arithmetic number, because the mean of its divisors is an integer number (23406481).

Almost surely, 2^165135424 is an apocalyptic number.

It is an amenable number.

165135424 is a deficient number, since it is larger than the sum of its proper divisors (162555310).

165135424 is an equidigital number, since it uses as much as digits as its factorization.

165135424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580253 (or 2580243 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 165135424 is about 12850.5028695378. The cubic root of 165135424 is about 548.6306696522.

Adding to 165135424 its reverse (424531561), we get a palindrome (589666985).

The spelling of 165135424 in words is "one hundred sixty-five million, one hundred thirty-five thousand, four hundred twenty-four".