201602551 has 4 divisors (see below), whose sum is σ = 202468032. Its totient is φ = 200737072.

The previous prime is 201602543. The next prime is 201602563. The reversal of 201602551 is 155206102.

201602551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155206102 = 2 ⋅77603051.

It is a cyclic number.

It is not a de Polignac number, because 201602551 - 2³ = 201602543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201602651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432391 + ... + 432856.

It is an arithmetic number, because the mean of its divisors is an integer number (50617008).

Almost surely, 2^201602551 is an apocalyptic number.

201602551 is a deficient number, since it is larger than the sum of its proper divisors (865481).

201602551 is an equidigital number, since it uses as much as digits as its factorization.

201602551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865480.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 201602551 is about 14198.6813120092. The cubic root of 201602551 is about 586.3613567576.

Adding to 201602551 its reverse (155206102), we get a palindrome (356808653).

The spelling of 201602551 in words is "two hundred one million, six hundred two thousand, five hundred fifty-one".