556051091 has 4 divisors (see below), whose sum is σ = 556613184. Its totient is φ = 555489000.

The previous prime is 556051063. The next prime is 556051099. The reversal of 556051091 is 190150655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 556051091 - 2¹⁴ = 556034707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556051099) 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, 279560 + ... + 281541.

It is an arithmetic number, because the mean of its divisors is an integer number (139153296).

Almost surely, 2^556051091 is an apocalyptic number.

556051091 is a deficient number, since it is larger than the sum of its proper divisors (562093).

556051091 is an equidigital number, since it uses as much as digits as its factorization.

556051091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562092.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 556051091 is about 23580.7355907317. The cubic root of 556051091 is about 822.3150379078.

The spelling of 556051091 in words is "five hundred fifty-six million, fifty-one thousand, ninety-one".