201136551 has 64 divisors (see below), whose sum is σ = 348281856. Its totient is φ = 100224000.

The previous prime is 201136549. The next prime is 201136583. The reversal of 201136551 is 155631102.

It is not a de Polignac number, because 201136551 - 2¹ = 201136549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201136511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 863131 + ... + 863363.

It is an arithmetic number, because the mean of its divisors is an integer number (5441904).

Almost surely, 2^201136551 is an apocalyptic number.

201136551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201136551 is a deficient number, since it is larger than the sum of its proper divisors (147145305).

201136551 is a wasteful number, since it uses less digits than its factorization.

201136551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 201136551 is about 14182.2618435848. The cubic root of 201136551 is about 585.9092209513.

Adding to 201136551 its reverse (155631102), we get a palindrome (356767653).

The spelling of 201136551 in words is "two hundred one million, one hundred thirty-six thousand, five hundred fifty-one".