7131820 has 12 divisors (see below), whose sum is σ = 14976864. Its totient is φ = 2852720.

The previous prime is 7131797. The next prime is 7131841. The reversal of 7131820 is 281317.

7131820 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 7131791 and 7131800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178276 + ... + 178315.

It is an arithmetic number, because the mean of its divisors is an integer number (1248072).

Almost surely, 2^7131820 is an apocalyptic number.

It is an amenable number.

7131820 is an abundant number, since it is smaller than the sum of its proper divisors (7845044).

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

7131820 is a wasteful number, since it uses less digits than its factorization.

7131820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356600 (or 356598 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 7131820 is about 2670.5467604968. The cubic root of 7131820 is about 192.4864329563.

The spelling of 7131820 in words is "seven million, one hundred thirty-one thousand, eight hundred twenty".