215140030555431 has 8 divisors (see below), whose sum is σ = 287437596833664. Its totient is φ = 143134575657080.

The previous prime is 215140030555361. The next prime is 215140030555433. The reversal of 215140030555431 is 134555030041512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215140030555431 is a prime.

It is a super-2 number, since 2×215140030555431² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215140030555431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215140030555433) 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, 73027843251 + ... + 73027846196.

It is an arithmetic number, because the mean of its divisors is an integer number (35929699604208).

Almost surely, 2^{215140030555431} is an apocalyptic number.

215140030555431 is a deficient number, since it is larger than the sum of its proper divisors (72297566278233).

215140030555431 is a wasteful number, since it uses less digits than its factorization.

215140030555431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146055689941.

The product of its (nonzero) digits is 180000, while the sum is 39.

Adding to 215140030555431 its reverse (134555030041512), we get a palindrome (349695060596943).

The spelling of 215140030555431 in words is "two hundred fifteen trillion, one hundred forty billion, thirty million, five hundred fifty-five thousand, four hundred thirty-one".