3561307220 has 24 divisors (see below), whose sum is σ = 7918672104. Its totient is φ = 1340727296.

The previous prime is 3561307157. The next prime is 3561307261. The reversal of 3561307220 is 227031653.

It can be written as a sum of positive squares in 4 ways, for example, as 1206728644 + 2354578576 = 34738^2 + 48524^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5236877 + ... + 5237556.

It is an arithmetic number, because the mean of its divisors is an integer number (329944671).

Almost surely, 2^3561307220 is an apocalyptic number.

It is an amenable number.

3561307220 is an abundant number, since it is smaller than the sum of its proper divisors (4357364884).

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

3561307220 is a wasteful number, since it uses less digits than its factorization.

3561307220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474459 (or 10474457 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 3561307220 is about 59676.6890837620. The cubic root of 3561307220 is about 1527.1082148845.

Adding to 3561307220 its reverse (227031653), we get a palindrome (3788338873).

The spelling of 3561307220 in words is "three billion, five hundred sixty-one million, three hundred seven thousand, two hundred twenty".