2061220151 has 4 divisors (see below), whose sum is σ = 2061506352. Its totient is φ = 2060933952.

The previous prime is 2061220129. The next prime is 2061220159. The reversal of 2061220151 is 1510221602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061220151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061220159) 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, 132011 + ... + 146796.

It is an arithmetic number, because the mean of its divisors is an integer number (515376588).

Almost surely, 2^2061220151 is an apocalyptic number.

2061220151 is a deficient number, since it is larger than the sum of its proper divisors (286201).

2061220151 is an equidigital number, since it uses as much as digits as its factorization.

2061220151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286200.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2061220151 is about 45400.6624511141. The cubic root of 2061220151 is about 1272.6474936049.

Adding to 2061220151 its reverse (1510221602), we get a palindrome (3571441753).

The spelling of 2061220151 in words is "two billion, sixty-one million, two hundred twenty thousand, one hundred fifty-one".