1561226810 has 64 divisors (see below), whose sum is σ = 3348221184. Its totient is φ = 516633600.

The previous prime is 1561226801. The next prime is 1561226819. The reversal of 1561226810 is 186221651.

1561226810 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1561226801) and next prime (1561226819).

It is a super-2 number, since 2×1561226810² = 4874858304525552200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1561226819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93842 + ... + 109218.

It is an arithmetic number, because the mean of its divisors is an integer number (52315956).

Almost surely, 2^1561226810 is an apocalyptic number.

1561226810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561226810 is an abundant number, since it is smaller than the sum of its proper divisors (1786994374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561226810 is a wasteful number, since it uses less digits than its factorization.

1561226810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15479.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1561226810 is about 39512.3627488916. The cubic root of 1561226810 is about 1160.0819427845.

The spelling of 1561226810 in words is "one billion, five hundred sixty-one million, two hundred twenty-six thousand, eight hundred ten".