25145225220 has 48 divisors (see below), whose sum is σ = 71371117440. Its totient is φ = 6613537536.

The previous prime is 25145225219. The next prime is 25145225299. The reversal of 25145225220 is 2252254152.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2866080 + ... + 2874839.

It is an arithmetic number, because the mean of its divisors is an integer number (1486898280).

Almost surely, 2^25145225220 is an apocalyptic number.

25145225220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25145225220 is an abundant number, since it is smaller than the sum of its proper divisors (46225892220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25145225220 is a wasteful number, since it uses less digits than its factorization.

25145225220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741004 (or 5741002 counting only the distinct ones).

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

Adding to 25145225220 its reverse (2252254152), we get a palindrome (27397479372).

It can be divided in two parts, 251452 and 25220, that added together give a palindrome (276672).

The spelling of 25145225220 in words is "twenty-five billion, one hundred forty-five million, two hundred twenty-five thousand, two hundred twenty".