2061271157 has 4 divisors (see below), whose sum is σ = 2248659456. Its totient is φ = 1873882860.

The previous prime is 2061271139. The next prime is 2061271159. The reversal of 2061271157 is 7511721602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2061271157 - 2²⁸ = 1792835701 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 (2061271159) 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, 93694133 + ... + 93694154.

It is an arithmetic number, because the mean of its divisors is an integer number (562164864).

Almost surely, 2^2061271157 is an apocalyptic number.

It is an amenable number.

2061271157 is a deficient number, since it is larger than the sum of its proper divisors (187388299).

2061271157 is a wasteful number, since it uses less digits than its factorization.

2061271157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187388298.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 2061271157 is about 45401.2241795307. The cubic root of 2061271157 is about 1272.6579909669.

Adding to 2061271157 its reverse (7511721602), we get a palindrome (9572992759).

The spelling of 2061271157 in words is "two billion, sixty-one million, two hundred seventy-one thousand, one hundred fifty-seven".