7156213 has 2 divisors, whose sum is σ = 7156214. Its totient is φ = 7156212.

The previous prime is 7156199. The next prime is 7156229. The reversal of 7156213 is 3126517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6036849 + 1119364 = 2457^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 7156213 - 2¹⁷ = 7025141 is a prime.

It is a super-2 number, since 2×7156213² = 102422769002738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7156913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3578106 + 3578107.

It is an arithmetic number, because the mean of its divisors is an integer number (3578107).

Almost surely, 2^7156213 is an apocalyptic number.

It is an amenable number.

7156213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7156213 is an equidigital number, since it uses as much as digits as its factorization.

7156213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 7156213 is about 2675.1099042843. The cubic root of 7156213 is about 192.7056373372.

The spelling of 7156213 in words is "seven million, one hundred fifty-six thousand, two hundred thirteen".