561055403 has 16 divisors (see below), whose sum is σ = 618192000. Its totient is φ = 507027456.

The previous prime is 561055361. The next prime is 561055423. The reversal of 561055403 is 304550165.

It is a cyclic number.

It is not a de Polignac number, because 561055403 - 2¹⁴ = 561039019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561055423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35723 + ... + 48971.

It is an arithmetic number, because the mean of its divisors is an integer number (38637000).

Almost surely, 2^561055403 is an apocalyptic number.

561055403 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

561055403 is a deficient number, since it is larger than the sum of its proper divisors (57136597).

561055403 is a wasteful number, since it uses less digits than its factorization.

561055403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13366.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 561055403 is about 23686.6080940265. The cubic root of 561055403 is about 824.7745465364.

The spelling of 561055403 in words is "five hundred sixty-one million, fifty-five thousand, four hundred three".