25563413 has 8 divisors (see below), whose sum is σ = 26547480. Its totient is φ = 24586240.

The previous prime is 25563407. The next prime is 25563431. The reversal of 25563413 is 31436552.

It can be written as a sum of positive squares in 4 ways, for example, as 14922769 + 10640644 = 3863^2 + 3262^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25563413 - 2¹⁴ = 25547029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25565413) 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, 6581 + ... + 9717.

It is an arithmetic number, because the mean of its divisors is an integer number (3318435).

Almost surely, 2^25563413 is an apocalyptic number.

It is an amenable number.

25563413 is a deficient number, since it is larger than the sum of its proper divisors (984067).

25563413 is a wasteful number, since it uses less digits than its factorization.

25563413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447.

The product of its digits is 10800, while the sum is 29.

The square root of 25563413 is about 5056.0273931220. The cubic root of 25563413 is about 294.5820491377.

Adding to 25563413 its reverse (31436552), we get a palindrome (56999965).

The spelling of 25563413 in words is "twenty-five million, five hundred sixty-three thousand, four hundred thirteen".