2011951 has 2 divisors, whose sum is σ = 2011952. Its totient is φ = 2011950.

The previous prime is 2011939. The next prime is 2011957. The reversal of 2011951 is 1591102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011951 - 2⁹ = 2011439 is a prime.

2011951 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005975 + 1005976.

It is an arithmetic number, because the mean of its divisors is an integer number (1005976).

2^2011951 is an apocalyptic number.

2011951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011951 is an equidigital number, since it uses as much as digits as its factorization.

2011951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 2011951 is about 1418.4325856381. The cubic root of 2011951 is about 126.2425620557.

The spelling of 2011951 in words is "two million, eleven thousand, nine hundred fifty-one".