25021222 has 4 divisors (see below), whose sum is σ = 37531836. Its totient is φ = 12510610.

The previous prime is 25021219. The next prime is 25021231. The reversal of 25021222 is 22212052.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 25021196 and 25021205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255304 + ... + 6255307.

It is an arithmetic number, because the mean of its divisors is an integer number (9382959).

Almost surely, 2^25021222 is an apocalyptic number.

25021222 is a deficient number, since it is larger than the sum of its proper divisors (12510614).

25021222 is a wasteful number, since it uses less digits than its factorization.

25021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12510613.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 25021222 is about 5002.1217498178. The cubic root of 25021222 is about 292.4844884267.

Adding to 25021222 its reverse (22212052), we get a palindrome (47233274).

The spelling of 25021222 in words is "twenty-five million, twenty-one thousand, two hundred twenty-two".