2561432301 has 20 divisors (see below), whose sum is σ = 3834913500. Its totient is φ = 1703794176.

The previous prime is 2561432267. The next prime is 2561432353. The reversal of 2561432301 is 1032341652.

2561432301 is a `hidden beast` number, since 25 + 614 + 3 + 23 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1419330276 + 1142102025 = 37674^2 + 33795^2 .

It is not a de Polignac number, because 2561432301 - 2¹¹ = 2561430253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561432501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1155 + ... + 71583.

It is an arithmetic number, because the mean of its divisors is an integer number (191745675).

Almost surely, 2^2561432301 is an apocalyptic number.

It is an amenable number.

2561432301 is a deficient number, since it is larger than the sum of its proper divisors (1273481199).

2561432301 is an equidigital number, since it uses as much as digits as its factorization.

2561432301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70890 (or 70881 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2561432301 is about 50610.5947505065. The cubic root of 2561432301 is about 1368.2358348029.

Adding to 2561432301 its reverse (1032341652), we get a palindrome (3593773953).

The spelling of 2561432301 in words is "two billion, five hundred sixty-one million, four hundred thirty-two thousand, three hundred one".