201335409 has 24 divisors (see below), whose sum is σ = 327860960. Its totient is φ = 122019480.

The previous prime is 201335363. The next prime is 201335411. The reversal of 201335409 is 904533102.

It is not a de Polignac number, because 201335409 - 2¹⁵ = 201302641 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201335489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27547 + ... + 34080.

Almost surely, 2^201335409 is an apocalyptic number.

It is an amenable number.

201335409 is a deficient number, since it is larger than the sum of its proper divisors (126525551).

201335409 is a wasteful number, since it uses less digits than its factorization.

201335409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61658 (or 61641 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 201335409 is about 14189.2709115021. The cubic root of 201335409 is about 586.1022479583.

The spelling of 201335409 in words is "two hundred one million, three hundred thirty-five thousand, four hundred nine".