201971490 has 32 divisors (see below), whose sum is σ = 553979520. Its totient is φ = 46164864.

The previous prime is 201971489. The next prime is 201971513. The reversal of 201971490 is 94179102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480675 + ... + 481094.

It is an arithmetic number, because the mean of its divisors is an integer number (17311860).

Almost surely, 2^201971490 is an apocalyptic number.

201971490 is an abundant number, since it is smaller than the sum of its proper divisors (352008030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201971490 is a wasteful number, since it uses less digits than its factorization.

201971490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961786.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 201971490 is about 14211.6673898596. The cubic root of 201971490 is about 586.7188253528.

The spelling of 201971490 in words is "two hundred one million, nine hundred seventy-one thousand, four hundred ninety".