2803138561 has 4 divisors (see below), whose sum is σ = 2803355392. Its totient is φ = 2802921732.

The previous prime is 2803138531. The next prime is 2803138577. The reversal of 2803138561 is 1658313082.

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 2803138561 - 2¹⁵ = 2803105793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2803138561.

It is not an unprimeable number, because it can be changed into a prime (2803138531) 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, 87705 + ... + 115318.

It is an arithmetic number, because the mean of its divisors is an integer number (700838848).

Almost surely, 2^2803138561 is an apocalyptic number.

It is an amenable number.

2803138561 is a deficient number, since it is larger than the sum of its proper divisors (216831).

2803138561 is a wasteful number, since it uses less digits than its factorization.

2803138561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216830.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 2803138561 is about 52944.6745291724. The cubic root of 2803138561 is about 1409.9861777898.

The spelling of 2803138561 in words is "two billion, eight hundred three million, one hundred thirty-eight thousand, five hundred sixty-one".