7211871740 has 24 divisors (see below), whose sum is σ = 15245234592. Its totient is φ = 2865643200.

The previous prime is 7211871727. The next prime is 7211871791. The reversal of 7211871740 is 471781127.

It is a super-2 number, since 2×7211871740² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7211871694 and 7211871703.

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, 1190999 + ... + 1197038.

It is an arithmetic number, because the mean of its divisors is an integer number (635218108).

Almost surely, 2^7211871740 is an apocalyptic number.

It is an amenable number.

7211871740 is an abundant number, since it is smaller than the sum of its proper divisors (8033362852).

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

7211871740 is a wasteful number, since it uses less digits than its factorization.

7211871740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388197 (or 2388195 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 38.

The square root of 7211871740 is about 84922.7398286231. The cubic root of 7211871740 is about 1932.0394863384.

The spelling of 7211871740 in words is "seven billion, two hundred eleven million, eight hundred seventy-one thousand, seven hundred forty".