216423454 has 8 divisors (see below), whose sum is σ = 349607160. Its totient is φ = 99887736.

The previous prime is 216423451. The next prime is 216423457. The reversal of 216423454 is 454324612.

It is an interprime number because it is at equal distance from previous prime (216423451) and next prime (216423457).

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

It is a super-2 number, since 2×216423454² = 93678222882580232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216423451) 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, 4161964 + ... + 4162015.

It is an arithmetic number, because the mean of its divisors is an integer number (43700895).

Almost surely, 2^216423454 is an apocalyptic number.

216423454 is a deficient number, since it is larger than the sum of its proper divisors (133183706).

216423454 is a wasteful number, since it uses less digits than its factorization.

216423454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323994.

The product of its digits is 23040, while the sum is 31.

The square root of 216423454 is about 14711.3376006399. The cubic root of 216423454 is about 600.3918310953.

The spelling of 216423454 in words is "two hundred sixteen million, four hundred twenty-three thousand, four hundred fifty-four".