215030243493 has 12 divisors (see below), whose sum is σ = 334491490060. Its totient is φ = 132326303616.

The previous prime is 215030243489. The next prime is 215030243497. The reversal of 215030243493 is 394342030512.

215030243493 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 302 + 4 + 349 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (215030243489) and next prime (215030243497).

It can be written as a sum of positive squares in 2 ways, for example, as 110541620484 + 104488623009 = 332478^2 + 323247^2 .

It is not a de Polignac number, because 215030243493 - 2² = 215030243489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215030243497) 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, 918932548 + ... + 918932781.

Almost surely, 2^215030243493 is an apocalyptic number.

It is an amenable number.

215030243493 is a deficient number, since it is larger than the sum of its proper divisors (119461246567).

215030243493 is a wasteful number, since it uses less digits than its factorization.

215030243493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837865348 (or 1837865345 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 215030243493 in words is "two hundred fifteen billion, thirty million, two hundred forty-three thousand, four hundred ninety-three".