215423110551131 has 4 divisors (see below), whose sum is σ = 246197840629872. Its totient is φ = 184648380472392.

The previous prime is 215423110551073. The next prime is 215423110551139. The reversal of 215423110551131 is 131155011324512.

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

It is a cyclic number.

It is not a de Polignac number, because 215423110551131 - 2¹⁴ = 215423110534747 is a prime.

It is a super-2 number, since 2×215423110551131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215423110551091 and 215423110551100.

It is not an unprimeable number, because it can be changed into a prime (215423110551139) 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, 15387365039360 + ... + 15387365039373.

It is an arithmetic number, because the mean of its divisors is an integer number (61549460157468).

Almost surely, 2^{215423110551131} is an apocalyptic number.

215423110551131 is a deficient number, since it is larger than the sum of its proper divisors (30774730078741).

215423110551131 is an equidigital number, since it uses as much as digits as its factorization.

215423110551131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30774730078740.

The product of its (nonzero) digits is 18000, while the sum is 35.

Adding to 215423110551131 its reverse (131155011324512), we get a palindrome (346578121875643).

The spelling of 215423110551131 in words is "two hundred fifteen trillion, four hundred twenty-three billion, one hundred ten million, five hundred fifty-one thousand, one hundred thirty-one".