1561224406 has 16 divisors (see below), whose sum is σ = 2792749824. Its totient is φ = 640004904.

The previous prime is 1561224389. The next prime is 1561224407. The reversal of 1561224406 is 6044221651.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561224407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2423940 + ... + 2424583.

It is an arithmetic number, because the mean of its divisors is an integer number (174546864).

Almost surely, 2^1561224406 is an apocalyptic number.

1561224406 is a deficient number, since it is larger than the sum of its proper divisors (1231525418).

1561224406 is a wasteful number, since it uses less digits than its factorization.

1561224406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848555.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1561224406 is about 39512.3323280213. The cubic root of 1561224406 is about 1160.0813473471.

The spelling of 1561224406 in words is "one billion, five hundred sixty-one million, two hundred twenty-four thousand, four hundred six".