228022691 has 8 divisors (see below), whose sum is σ = 246351840. Its totient is φ = 209806272.

The previous prime is 228022657. The next prime is 228022699. The reversal of 228022691 is 196220822.

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

It is a de Polignac number, because none of the positive numbers 2^k-228022691 is a prime.

It is a super-2 number, since 2×228022691² = 103988695221762962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228022699) 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, 23951 + ... + 32088.

It is an arithmetic number, because the mean of its divisors is an integer number (30793980).

Almost surely, 2^228022691 is an apocalyptic number.

228022691 is a deficient number, since it is larger than the sum of its proper divisors (18329149).

228022691 is a wasteful number, since it uses less digits than its factorization.

228022691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56365.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 228022691 is about 15100.4202259407. The cubic root of 228022691 is about 610.9317401196.

The spelling of 228022691 in words is "two hundred twenty-eight million, twenty-two thousand, six hundred ninety-one".