25240001215 has 64 divisors (see below), whose sum is σ = 36828836352. Its totient is φ = 16358284800.

The previous prime is 25240001183. The next prime is 25240001219. The reversal of 25240001215 is 51210004252.

It is not a de Polignac number, because 25240001215 - 2⁵ = 25240001183 is a prime.

It is a super-2 number, since 2×25240001215² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25240001219) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3461964 + ... + 3469246.

It is an arithmetic number, because the mean of its divisors is an integer number (575450568).

Almost surely, 2^25240001215 is an apocalyptic number.

25240001215 is a deficient number, since it is larger than the sum of its proper divisors (11588835137).

25240001215 is a wasteful number, since it uses less digits than its factorization.

25240001215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7480.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 25240001215 its reverse (51210004252), we get a palindrome (76450005467).

The spelling of 25240001215 in words is "twenty-five billion, two hundred forty million, one thousand, two hundred fifteen".