2061240191 has 24 divisors (see below), whose sum is σ = 2274707904. Its totient is φ = 1865963520.

The previous prime is 2061240187. The next prime is 2061240199. The reversal of 2061240191 is 1910421602.

It is not a de Polignac number, because 2061240191 - 2² = 2061240187 is a prime.

It is a super-2 number, since 2×2061240191² = 8497422249987432962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2061240191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061240199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 863786 + ... + 866168.

It is an arithmetic number, because the mean of its divisors is an integer number (94779496).

Almost surely, 2^2061240191 is an apocalyptic number.

2061240191 is a deficient number, since it is larger than the sum of its proper divisors (213467713).

2061240191 is a wasteful number, since it uses less digits than its factorization.

2061240191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531 (or 2514 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2061240191 is about 45400.8831522031. The cubic root of 2061240191 is about 1272.6516179861.

Adding to 2061240191 its reverse (1910421602), we get a palindrome (3971661793).

The spelling of 2061240191 in words is "two billion, sixty-one million, two hundred forty thousand, one hundred ninety-one".