25121450343 has 64 divisors (see below), whose sum is σ = 39014092800. Its totient is φ = 14218364160.

The previous prime is 25121450339. The next prime is 25121450399. The reversal of 25121450343 is 34305412152.

It is not a de Polignac number, because 25121450343 - 2² = 25121450339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25121450343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25121450323) 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, 30523830 + ... + 30524652.

It is an arithmetic number, because the mean of its divisors is an integer number (609595200).

Almost surely, 2^25121450343 is an apocalyptic number.

25121450343 is a deficient number, since it is larger than the sum of its proper divisors (13892642457).

25121450343 is a wasteful number, since it uses less digits than its factorization.

25121450343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 25121450343 its reverse (34305412152), we get a palindrome (59426862495).

The spelling of 25121450343 in words is "twenty-five billion, one hundred twenty-one million, four hundred fifty thousand, three hundred forty-three".