25220613 has 8 divisors (see below), whose sum is σ = 36684576. Its totient is φ = 15285200.

The previous prime is 25220597. The next prime is 25220641. The reversal of 25220613 is 31602252.

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 25220613 - 2⁴ = 25220597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25220613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220693) 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, 382098 + ... + 382163.

It is an arithmetic number, because the mean of its divisors is an integer number (4585572).

Almost surely, 2^25220613 is an apocalyptic number.

It is an amenable number.

25220613 is a deficient number, since it is larger than the sum of its proper divisors (11463963).

25220613 is a wasteful number, since it uses less digits than its factorization.

25220613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764275.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 25220613 is about 5022.0128434722. The cubic root of 25220613 is about 293.2593579241.

Adding to 25220613 its reverse (31602252), we get a palindrome (56822865).

The spelling of 25220613 in words is "twenty-five million, two hundred twenty thousand, six hundred thirteen".