201851492 has 18 divisors (see below), whose sum is σ = 355783218. Its totient is φ = 100204288.

The previous prime is 201851483. The next prime is 201851521. The reversal of 201851492 is 294158102.

It can be written as a sum of positive squares in 3 ways, for example, as 6522916 + 195328576 = 2554^2 + 13976^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87668 + ... + 89940.

Almost surely, 2^201851492 is an apocalyptic number.

It is an amenable number.

201851492 is a deficient number, since it is larger than the sum of its proper divisors (153931726).

201851492 is a wasteful number, since it uses less digits than its factorization.

201851492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575 (or 2424 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 201851492 is about 14207.4449497438. Note that the first 3 decimals coincide. The cubic root of 201851492 is about 586.6026059241.

The spelling of 201851492 in words is "two hundred one million, eight hundred fifty-one thousand, four hundred ninety-two".