215425196581 has 8 divisors (see below), whose sum is σ = 247830690944. Its totient is φ = 183427318800.

The previous prime is 215425196563. The next prime is 215425196633. The reversal of 215425196581 is 185691524512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215425196581 - 2¹¹ = 215425194533 is a prime.

It is a super-2 number, since 2×215425196581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215425196501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101903010 + ... + 101905123.

It is an arithmetic number, because the mean of its divisors is an integer number (30978836368).

Almost surely, 2^215425196581 is an apocalyptic number.

It is an amenable number.

215425196581 is a deficient number, since it is larger than the sum of its proper divisors (32405494363).

215425196581 is a wasteful number, since it uses less digits than its factorization.

215425196581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203808291.

The product of its digits is 864000, while the sum is 49.

The spelling of 215425196581 in words is "two hundred fifteen billion, four hundred twenty-five million, one hundred ninety-six thousand, five hundred eighty-one".