2001571373 has 4 divisors (see below), whose sum is σ = 2019284508. Its totient is φ = 1983858240.

The previous prime is 2001571367. The next prime is 2001571423. The reversal of 2001571373 is 3731751002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 508367209 + 1493204164 = 22547^2 + 38642^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001571373 - 2⁴ = 2001571357 is a prime.

It is a super-2 number, since 2×2001571373² = 8012575922426210258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001571073) 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, 8856398 + ... + 8856623.

It is an arithmetic number, because the mean of its divisors is an integer number (504821127).

Almost surely, 2^2001571373 is an apocalyptic number.

It is an amenable number.

2001571373 is a deficient number, since it is larger than the sum of its proper divisors (17713135).

2001571373 is a wasteful number, since it uses less digits than its factorization.

2001571373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17713134.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 2001571373 is about 44738.9245847506. The cubic root of 2001571373 is about 1260.2509311689.

The spelling of 2001571373 in words is "two billion, one million, five hundred seventy-one thousand, three hundred seventy-three".