7216137 has 12 divisors (see below), whose sum is σ = 10447684. Its totient is φ = 4799520.

The previous prime is 7216129. The next prime is 7216141. The reversal of 7216137 is 7316127.

It can be written as a sum of positive squares in 2 ways, for example, as 2653641 + 4562496 = 1629^2 + 2136^2 .

It is not a de Polignac number, because 7216137 - 2³ = 7216129 is a prime.

It is a Duffinian number.

7216137 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7216137.

It is not an unprimeable number, because it can be changed into a prime (7216037) 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, 5343 + ... + 6555.

Almost surely, 2^7216137 is an apocalyptic number.

It is an amenable number.

7216137 is a deficient number, since it is larger than the sum of its proper divisors (3231547).

7216137 is a wasteful number, since it uses less digits than its factorization.

7216137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880 (or 1877 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 7216137 is about 2686.2868424649. The cubic root of 7216137 is about 193.2420294863.

The spelling of 7216137 in words is "seven million, two hundred sixteen thousand, one hundred thirty-seven".