215480693 has 2 divisors, whose sum is σ = 215480694. Its totient is φ = 215480692.

The previous prime is 215480689. The next prime is 215480723. The reversal of 215480693 is 396084512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212634724 + 2845969 = 14582^2 + 1687^2 .

It is a cyclic number.

It is not a de Polignac number, because 215480693 - 2² = 215480689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215480623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107740346 + 107740347.

It is an arithmetic number, because the mean of its divisors is an integer number (107740347).

Almost surely, 2^215480693 is an apocalyptic number.

It is an amenable number.

215480693 is a deficient number, since it is larger than the sum of its proper divisors (1).

215480693 is an equidigital number, since it uses as much as digits as its factorization.

215480693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 215480693 is about 14679.2606421441. The cubic root of 215480693 is about 599.5187743248.

The spelling of 215480693 in words is "two hundred fifteen million, four hundred eighty thousand, six hundred ninety-three".