561562402 has 4 divisors (see below), whose sum is σ = 842343606. Its totient is φ = 280781200.

The previous prime is 561562381. The next prime is 561562403. The reversal of 561562402 is 204265165.

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

It can be written as a sum of positive squares in only one way, i.e., 560789761 + 772641 = 23681^2 + 879^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (561562403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140390599 + ... + 140390602.

Almost surely, 2^561562402 is an apocalyptic number.

561562402 is a deficient number, since it is larger than the sum of its proper divisors (280781204).

561562402 is a wasteful number, since it uses less digits than its factorization.

561562402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280781203.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 561562402 is about 23697.3079061736. The cubic root of 561562402 is about 825.0229082099.

The spelling of 561562402 in words is "five hundred sixty-one million, five hundred sixty-two thousand, four hundred two".