215440504141 has 4 divisors (see below), whose sum is σ = 215442511452. Its totient is φ = 215438496832.

The previous prime is 215440504117. The next prime is 215440504151. The reversal of 215440504141 is 141405044512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16627070916 + 198813433225 = 128946^2 + 445885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215440504141 is a prime.

It is a super-2 number, since 2×215440504141² (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 (215440504151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832990 + ... + 1060543.

It is an arithmetic number, because the mean of its divisors is an integer number (53860627863).

Almost surely, 2^215440504141 is an apocalyptic number.

It is an amenable number.

215440504141 is a deficient number, since it is larger than the sum of its proper divisors (2007311).

215440504141 is a wasteful number, since it uses less digits than its factorization.

215440504141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007310.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 215440504141 its reverse (141405044512), we get a palindrome (356845548653).

The spelling of 215440504141 in words is "two hundred fifteen billion, four hundred forty million, five hundred four thousand, one hundred forty-one".