2003556157 has 2 divisors, whose sum is σ = 2003556158. Its totient is φ = 2003556156.

The previous prime is 2003556119. The next prime is 2003556169. The reversal of 2003556157 is 7516553002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1738973401 + 264582756 = 41701^2 + 16266^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003556157 - 2¹⁹ = 2003031869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003556187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001778078 + 1001778079.

It is an arithmetic number, because the mean of its divisors is an integer number (1001778079).

Almost surely, 2^2003556157 is an apocalyptic number.

It is an amenable number.

2003556157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003556157 is an equidigital number, since it uses as much as digits as its factorization.

2003556157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 2003556157 is about 44761.1009359689. The cubic root of 2003556157 is about 1260.6673539173.

The spelling of 2003556157 in words is "two billion, three million, five hundred fifty-six thousand, one hundred fifty-seven".