216224401451 has 4 divisors (see below), whose sum is σ = 216358787400. Its totient is φ = 216090015504.

The previous prime is 216224401427. The next prime is 216224401487. The reversal of 216224401451 is 154104422612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216224401451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216224401951) 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, 67190561 + ... + 67193778.

It is an arithmetic number, because the mean of its divisors is an integer number (54089696850).

Almost surely, 2^216224401451 is an apocalyptic number.

216224401451 is a deficient number, since it is larger than the sum of its proper divisors (134385949).

216224401451 is a wasteful number, since it uses less digits than its factorization.

216224401451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134385948.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 216224401451 in words is "two hundred sixteen billion, two hundred twenty-four million, four hundred one thousand, four hundred fifty-one".