25152021435 has 16 divisors (see below), whose sum is σ = 40843881216. Its totient is φ = 13214195808.

The previous prime is 25152021409. The next prime is 25152021439. The reversal of 25152021435 is 53412025152.

It is not a de Polignac number, because 25152021435 - 2⁵ = 25152021403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25152021439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12512439 + ... + 12514448.

It is an arithmetic number, because the mean of its divisors is an integer number (2552742576).

Almost surely, 2^25152021435 is an apocalyptic number.

25152021435 is a deficient number, since it is larger than the sum of its proper divisors (15691859781).

25152021435 is a wasteful number, since it uses less digits than its factorization.

25152021435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25026962.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 25152021435 its reverse (53412025152), we get a palindrome (78564046587).

The spelling of 25152021435 in words is "twenty-five billion, one hundred fifty-two million, twenty-one thousand, four hundred thirty-five".