258216971 has 2 divisors, whose sum is σ = 258216972. Its totient is φ = 258216970.

The previous prime is 258216943. The next prime is 258216979. The reversal of 258216971 is 179612852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 258216971 - 2¹⁴ = 258200587 is a prime.

It is a super-2 number, since 2×258216971² = 133352008224829682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (258216979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129108485 + 129108486.

It is an arithmetic number, because the mean of its divisors is an integer number (129108486).

Almost surely, 2^258216971 is an apocalyptic number.

258216971 is a deficient number, since it is larger than the sum of its proper divisors (1).

258216971 is an equidigital number, since it uses as much as digits as its factorization.

258216971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 258216971 is about 16069.1309970390. The cubic root of 258216971 is about 636.7880831942.

The spelling of 258216971 in words is "two hundred fifty-eight million, two hundred sixteen thousand, nine hundred seventy-one".