7215206740 has 24 divisors (see below), whose sum is σ = 17316496512. Its totient is φ = 2473785120.

The previous prime is 7215206717. The next prime is 7215206783. The reversal of 7215206740 is 476025127.

It is a junction number, because it is equal to n+sod(n) for n = 7215206696 and 7215206705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25768456 + ... + 25768735.

It is an arithmetic number, because the mean of its divisors is an integer number (721520688).

Almost surely, 2^7215206740 is an apocalyptic number.

7215206740 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7215206740 is an abundant number, since it is smaller than the sum of its proper divisors (10101289772).

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

7215206740 is a wasteful number, since it uses less digits than its factorization.

7215206740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51537207 (or 51537205 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 7215206740 is about 84942.3730537357. The cubic root of 7215206740 is about 1932.3372527145.

The spelling of 7215206740 in words is "seven billion, two hundred fifteen million, two hundred six thousand, seven hundred forty".