215153131431 has 8 divisors (see below), whose sum is σ = 327852390784. Its totient is φ = 122944646520.

The previous prime is 215153131423. The next prime is 215153131433. The reversal of 215153131431 is 134131351512.

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

It is not a de Polignac number, because 215153131431 - 2³ = 215153131423 is a prime.

It is a super-2 number, since 2×215153131431² (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 (215153131433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5122693585 + ... + 5122693626.

It is an arithmetic number, because the mean of its divisors is an integer number (40981548848).

Almost surely, 2^215153131431 is an apocalyptic number.

215153131431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

215153131431 is a deficient number, since it is larger than the sum of its proper divisors (112699259353).

215153131431 is a wasteful number, since it uses less digits than its factorization.

215153131431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10245387221.

The product of its digits is 5400, while the sum is 30.

Adding to 215153131431 its reverse (134131351512), we get a palindrome (349284482943).

The spelling of 215153131431 in words is "two hundred fifteen billion, one hundred fifty-three million, one hundred thirty-one thousand, four hundred thirty-one".