25533401 has 2 divisors, whose sum is σ = 25533402. Its totient is φ = 25533400.

The previous prime is 25533377. The next prime is 25533419. The reversal of 25533401 is 10433552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20693401 + 4840000 = 4549^2 + 2200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25533401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25533451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766700 + 12766701.

It is an arithmetic number, because the mean of its divisors is an integer number (12766701).

Almost surely, 2^25533401 is an apocalyptic number.

It is an amenable number.

25533401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25533401 is an equidigital number, since it uses as much as digits as its factorization.

25533401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 25533401 is about 5053.0585787224. The cubic root of 25533401 is about 294.4667220938.

Adding to 25533401 its reverse (10433552), we get a palindrome (35966953).

The spelling of 25533401 in words is "twenty-five million, five hundred thirty-three thousand, four hundred one".