201371649 has 16 divisors (see below), whose sum is σ = 279878208. Its totient is φ = 128665152.

The previous prime is 201371617. The next prime is 201371657. The reversal of 201371649 is 946173102.

It is not a de Polignac number, because 201371649 - 2⁵ = 201371617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201371609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6102 + ... + 20975.

It is an arithmetic number, because the mean of its divisors is an integer number (17492388).

Almost surely, 2^201371649 is an apocalyptic number.

It is an amenable number.

201371649 is a deficient number, since it is larger than the sum of its proper divisors (78506559).

201371649 is a wasteful number, since it uses less digits than its factorization.

201371649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27184.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 201371649 is about 14190.5478752584. The cubic root of 201371649 is about 586.1374116209.

It can be divided in two parts, 201 and 371649, that multiplied together give a square (74701449 = 8643²).

The spelling of 201371649 in words is "two hundred one million, three hundred seventy-one thousand, six hundred forty-nine".