561402231 has 8 divisors (see below), whose sum is σ = 806116080. Its totient is φ = 345478272.

The previous prime is 561402229. The next prime is 561402293. The reversal of 561402231 is 132204165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561402231 - 2¹ = 561402229 is a prime.

It is a super-2 number, since 2×561402231² = 630344929943554722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561402131) 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, 7197426 + ... + 7197503.

It is an arithmetic number, because the mean of its divisors is an integer number (100764510).

Almost surely, 2^561402231 is an apocalyptic number.

561402231 is a deficient number, since it is larger than the sum of its proper divisors (244713849).

561402231 is a wasteful number, since it uses less digits than its factorization.

561402231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14394945.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 561402231 is about 23693.9281462572. The cubic root of 561402231 is about 824.9444620097.

Adding to 561402231 its reverse (132204165), we get a palindrome (693606396).

The spelling of 561402231 in words is "five hundred sixty-one million, four hundred two thousand, two hundred thirty-one".