2061247557 has 16 divisors (see below), whose sum is σ = 2928844800. Its totient is φ = 1286450352.

The previous prime is 2061247553. The next prime is 2061247561. The reversal of 2061247557 is 7557421602.

It is an interprime number because it is at equal distance from previous prime (2061247553) and next prime (2061247561).

It is not a de Polignac number, because 2061247557 - 2² = 2061247553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061247553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314557 + ... + 321042.

It is an arithmetic number, because the mean of its divisors is an integer number (183052800).

Almost surely, 2^2061247557 is an apocalyptic number.

It is an amenable number.

2061247557 is a deficient number, since it is larger than the sum of its proper divisors (867597243).

2061247557 is a wasteful number, since it uses less digits than its factorization.

2061247557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635672.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 2061247557 is about 45400.9642739006. The cubic root of 2061247557 is about 1272.6531339570.

The spelling of 2061247557 in words is "two billion, sixty-one million, two hundred forty-seven thousand, five hundred fifty-seven".