215481367 has 2 divisors, whose sum is σ = 215481368. Its totient is φ = 215481366.

The previous prime is 215481359. The next prime is 215481389. The reversal of 215481367 is 763184512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215481367 - 2³ = 215481359 is a prime.

It is equal to p_11887390 and since 215481367 and 11887390 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215481667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107740683 + 107740684.

It is an arithmetic number, because the mean of its divisors is an integer number (107740684).

Almost surely, 2^215481367 is an apocalyptic number.

215481367 is a deficient number, since it is larger than the sum of its proper divisors (1).

215481367 is an equidigital number, since it uses as much as digits as its factorization.

215481367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 215481367 is about 14679.2835996856. The cubic root of 215481367 is about 599.5193994005.

It can be divided in two parts, 2154 and 81367, that added together give a 4-th power (83521 = 17⁴).

The spelling of 215481367 in words is "two hundred fifteen million, four hundred eighty-one thousand, three hundred sixty-seven".