216572431 has 8 divisors (see below), whose sum is σ = 228206720. Its totient is φ = 204961752.

The previous prime is 216572429. The next prime is 216572449. The reversal of 216572431 is 134275612.

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 216572431 - 2¹ = 216572429 is a prime.

It is a super-2 number, since 2×216572431² = 93807235738499522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216572393 and 216572402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216572491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14836 + ... + 25558.

It is an arithmetic number, because the mean of its divisors is an integer number (28525840).

Almost surely, 2^216572431 is an apocalyptic number.

216572431 is a deficient number, since it is larger than the sum of its proper divisors (11634289).

216572431 is a wasteful number, since it uses less digits than its factorization.

216572431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11805.

The product of its digits is 10080, while the sum is 31.

The square root of 216572431 is about 14716.4000693104. The cubic root of 216572431 is about 600.5295611745.

The spelling of 216572431 in words is "two hundred sixteen million, five hundred seventy-two thousand, four hundred thirty-one".