25222021545 has 32 divisors (see below), whose sum is σ = 46128955392. Its totient is φ = 11527895232.

The previous prime is 25222021519. The next prime is 25222021571. The reversal of 25222021545 is 54512022252.

It is an interprime number because it is at equal distance from previous prime (25222021519) and next prime (25222021571).

It is not a de Polignac number, because 25222021545 - 2¹¹ = 25222019497 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 625464 + ... + 664566.

It is an arithmetic number, because the mean of its divisors is an integer number (1441529856).

Almost surely, 2^25222021545 is an apocalyptic number.

It is an amenable number.

25222021545 is a deficient number, since it is larger than the sum of its proper divisors (20906933847).

25222021545 is a wasteful number, since it uses less digits than its factorization.

25222021545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45261.

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 25222021545 its reverse (54512022252), we get a palindrome (79734043797).

The spelling of 25222021545 in words is "twenty-five billion, two hundred twenty-two million, twenty-one thousand, five hundred forty-five".