7220151820 has 48 divisors (see below), whose sum is σ = 17587019520. Its totient is φ = 2438529984.

The previous prime is 7220151793. The next prime is 7220151863. The reversal of 7220151820 is 281510227.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 375490 + ... + 394249.

It is an arithmetic number, because the mean of its divisors is an integer number (366396240).

Almost surely, 2^7220151820 is an apocalyptic number.

7220151820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7220151820 is an abundant number, since it is smaller than the sum of its proper divisors (10366867700).

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

7220151820 is a wasteful number, since it uses less digits than its factorization.

7220151820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769822 (or 769820 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 7220151820 is about 84971.4765082966. The cubic root of 7220151820 is about 1932.7786066700.

The spelling of 7220151820 in words is "seven billion, two hundred twenty million, one hundred fifty-one thousand, eight hundred twenty".