25135352220443 has 4 divisors (see below), whose sum is σ = 25438187789448. Its totient is φ = 24832516651440.

The previous prime is 25135352220439. The next prime is 25135352220457. The reversal of 25135352220443 is 34402225353152.

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

It is a cyclic number.

It is not a de Polignac number, because 25135352220443 - 2² = 25135352220439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25135352220443.

It is not an unprimeable number, because it can be changed into a prime (25135352226443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151417784378 + ... + 151417784543.

It is an arithmetic number, because the mean of its divisors is an integer number (6359546947362).

Almost surely, 2^{25135352220443} is an apocalyptic number.

25135352220443 is a deficient number, since it is larger than the sum of its proper divisors (302835569005).

25135352220443 is an equidigital number, since it uses as much as digits as its factorization.

25135352220443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302835569004.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 25135352220443 its reverse (34402225353152), we get a palindrome (59537577573595).

The spelling of 25135352220443 in words is "twenty-five trillion, one hundred thirty-five billion, three hundred fifty-two million, two hundred twenty thousand, four hundred forty-three".