1561471030 has 24 divisors (see below), whose sum is σ = 3212849232. Its totient is φ = 535248144.

The previous prime is 1561471027. The next prime is 1561471057. The reversal of 1561471030 is 301741651.

It is a self number, because there is not a number n which added to its sum of digits gives 1561471030.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 328249 + ... + 332971.

It is an arithmetic number, because the mean of its divisors is an integer number (133868718).

Almost surely, 2^1561471030 is an apocalyptic number.

1561471030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561471030 is an abundant number, since it is smaller than the sum of its proper divisors (1651378202).

1561471030 is an frugal number, since it uses more digits than its factorization.

1561471030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460 (or 4737 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1561471030 is about 39515.4530532044. The cubic root of 1561471030 is about 1160.1424294989.

Multiplying 1561471030 by its product of nonzero digits (2520), we get a square (3934906995600 = 1983660²).

The spelling of 1561471030 in words is "one billion, five hundred sixty-one million, four hundred seventy-one thousand, thirty".