2001871951 has 2 divisors, whose sum is σ = 2001871952. Its totient is φ = 2001871950.

The previous prime is 2001871889. The next prime is 2001871967. The reversal of 2001871951 is 1591781002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001871951 - 2²⁹ = 1465001039 is a prime.

It is a super-3 number, since 3×2001871951³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001871981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000935975 + 1000935976.

It is an arithmetic number, because the mean of its divisors is an integer number (1000935976).

Almost surely, 2^2001871951 is an apocalyptic number.

2001871951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001871951 is an equidigital number, since it uses as much as digits as its factorization.

2001871951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 2001871951 is about 44742.2837034499. The cubic root of 2001871951 is about 1260.3140123975.

The spelling of 2001871951 in words is "two billion, one million, eight hundred seventy-one thousand, nine hundred fifty-one".