216472431 has 8 divisors (see below), whose sum is σ = 329862784. Its totient is φ = 123698520.

The previous prime is 216472429. The next prime is 216472433. The reversal of 216472431 is 134274612.

It is an interprime number because it is at equal distance from previous prime (216472429) and next prime (216472433).

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

It is not a de Polignac number, because 216472431 - 2¹ = 216472429 is a prime.

It is a super-2 number, since 2×216472431² = 93720626766099522, which 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 (216472433) 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, 5154085 + ... + 5154126.

It is an arithmetic number, because the mean of its divisors is an integer number (41232848).

Almost surely, 2^216472431 is an apocalyptic number.

216472431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

216472431 is a deficient number, since it is larger than the sum of its proper divisors (113390353).

216472431 is a wasteful number, since it uses less digits than its factorization.

216472431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308221.

The product of its digits is 8064, while the sum is 30.

The square root of 216472431 is about 14713.0021069801. The cubic root of 216472431 is about 600.4371175808.

The spelling of 216472431 in words is "two hundred sixteen million, four hundred seventy-two thousand, four hundred thirty-one".