25220101 has 4 divisors (see below), whose sum is σ = 25238304. Its totient is φ = 25201900.

The previous prime is 25220099. The next prime is 25220119. The reversal of 25220101 is 10102252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25220101 - 2¹ = 25220099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6835 + ... + 9856.

It is an arithmetic number, because the mean of its divisors is an integer number (6309576).

Almost surely, 2^25220101 is an apocalyptic number.

It is an amenable number.

25220101 is a deficient number, since it is larger than the sum of its proper divisors (18203).

25220101 is a wasteful number, since it uses less digits than its factorization.

25220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 25220101 is about 5021.9618676370. The cubic root of 25220101 is about 293.2573734388.

Adding to 25220101 its reverse (10102252), we get a palindrome (35322353).

The spelling of 25220101 in words is "twenty-five million, two hundred twenty thousand, one hundred one".