2012557139 has 4 divisors (see below), whose sum is σ = 2012668560. Its totient is φ = 2012445720.

The previous prime is 2012557117. The next prime is 2012557171. The reversal of 2012557139 is 9317552102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2012557139 - 2¹² = 2012553043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012557099 and 2012557108.

It is not an unprimeable number, because it can be changed into a prime (2012557199) 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, 21692 + ... + 67049.

It is an arithmetic number, because the mean of its divisors is an integer number (503167140).

Almost surely, 2^2012557139 is an apocalyptic number.

2012557139 is a deficient number, since it is larger than the sum of its proper divisors (111421).

2012557139 is an equidigital number, since it uses as much as digits as its factorization.

2012557139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111420.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 2012557139 is about 44861.5329541914. The cubic root of 2012557139 is about 1262.5523845074.

The spelling of 2012557139 in words is "two billion, twelve million, five hundred fifty-seven thousand, one hundred thirty-nine".