25070221 has 8 divisors (see below), whose sum is σ = 27813600. Its totient is φ = 22404240.

The previous prime is 25070209. The next prime is 25070237. The reversal of 25070221 is 12207052.

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 25070221 - 2¹⁷ = 24939149 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 (25070281) 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, 18666 + ... + 19963.

It is an arithmetic number, because the mean of its divisors is an integer number (3476700).

Almost surely, 2^25070221 is an apocalyptic number.

It is an amenable number.

25070221 is a deficient number, since it is larger than the sum of its proper divisors (2743379).

25070221 is a wasteful number, since it uses less digits than its factorization.

25070221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38699.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 25070221 is about 5007.0171759242. The cubic root of 25070221 is about 292.6752878280.

Adding to 25070221 its reverse (12207052), we get a palindrome (37277273).

The spelling of 25070221 in words is "twenty-five million, seventy thousand, two hundred twenty-one".