201020615 has 4 divisors (see below), whose sum is σ = 241224744. Its totient is φ = 160816488.

The previous prime is 201020587. The next prime is 201020623. The reversal of 201020615 is 516020102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201020615 - 2¹⁰ = 201019591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201020593 and 201020602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20102057 + ... + 20102066.

It is an arithmetic number, because the mean of its divisors is an integer number (60306186).

Almost surely, 2^201020615 is an apocalyptic number.

201020615 is a deficient number, since it is larger than the sum of its proper divisors (40204129).

201020615 is an equidigital number, since it uses as much as digits as its factorization.

201020615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40204128.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 201020615 is about 14178.1738951108. The cubic root of 201020615 is about 585.7966257573.

Adding to 201020615 its reverse (516020102), we get a palindrome (717040717).

The spelling of 201020615 in words is "two hundred one million, twenty thousand, six hundred fifteen".