215400320433 has 12 divisors (see below), whose sum is σ = 315395903940. Its totient is φ = 141633086976.

The previous prime is 215400320413. The next prime is 215400320467. The reversal of 215400320433 is 334023004512.

215400320433 is a `hidden beast` number, since 21 + 5 + 400 + 3 + 204 + 33 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 166503170304 + 48897150129 = 408048^2 + 221127^2 .

It is not a de Polignac number, because 215400320433 - 2²¹ = 215398223281 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215400320397 and 215400320406.

It is not an unprimeable number, because it can be changed into a prime (215400320413) 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, 163926528 + ... + 163927841.

It is an arithmetic number, because the mean of its divisors is an integer number (26282991995).

Almost surely, 2^215400320433 is an apocalyptic number.

It is an amenable number.

215400320433 is a deficient number, since it is larger than the sum of its proper divisors (99995583507).

215400320433 is a wasteful number, since it uses less digits than its factorization.

215400320433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327854448 (or 327854445 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 215400320433 its reverse (334023004512), we get a palindrome (549423324945).

The spelling of 215400320433 in words is "two hundred fifteen billion, four hundred million, three hundred twenty thousand, four hundred thirty-three".