4255172820 has 36 divisors (see below), whose sum is σ = 12907358100. Its totient is φ = 1134712704.

The previous prime is 4255172819. The next prime is 4255172821. The reversal of 4255172820 is 282715524.

It is a happy number.

4255172820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4255172819) and next prime (4255172821).

It can be written as a sum of positive squares in 2 ways, for example, as 595164816 + 3660008004 = 24396^2 + 60498^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4255172821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11819745 + ... + 11820104.

It is an arithmetic number, because the mean of its divisors is an integer number (358537725).

Almost surely, 2^4255172820 is an apocalyptic number.

It is an amenable number.

4255172820 is an abundant number, since it is smaller than the sum of its proper divisors (8652185280).

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

4255172820 is a wasteful number, since it uses less digits than its factorization.

4255172820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23639864 (or 23639859 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 4255172820 is about 65231.6857056446. The cubic root of 4255172820 is about 1620.4628078713.

The spelling of 4255172820 in words is "four billion, two hundred fifty-five million, one hundred seventy-two thousand, eight hundred twenty".