25120215 has 24 divisors (see below), whose sum is σ = 43980768. Its totient is φ = 13262400.

The previous prime is 25120201. The next prime is 25120217. The reversal of 25120215 is 51202152.

It is not a de Polignac number, because 25120215 - 2¹⁷ = 24989143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25120217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1782 + ... + 7308.

It is an arithmetic number, because the mean of its divisors is an integer number (1832532).

Almost surely, 2^25120215 is an apocalyptic number.

25120215 is a deficient number, since it is larger than the sum of its proper divisors (18860553).

25120215 is a wasteful number, since it uses less digits than its factorization.

25120215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639 (or 5636 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 25120215 is about 5012.0070829958. The cubic root of 25120215 is about 292.8697056450.

Adding to 25120215 its reverse (51202152), we get a palindrome (76322367).

The spelling of 25120215 in words is "twenty-five million, one hundred twenty thousand, two hundred fifteen".