228161051 has 2 divisors, whose sum is σ = 228161052. Its totient is φ = 228161050.

The previous prime is 228161039. The next prime is 228161071. The reversal of 228161051 is 150161822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228161051 - 2¹⁴ = 228144667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228161051.

It is not a weakly prime, because it can be changed into another prime (228161071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114080525 + 114080526.

It is an arithmetic number, because the mean of its divisors is an integer number (114080526).

Almost surely, 2^228161051 is an apocalyptic number.

228161051 is a deficient number, since it is larger than the sum of its proper divisors (1).

228161051 is an equidigital number, since it uses as much as digits as its factorization.

228161051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 228161051 is about 15105.0008606421. Note that the first 3 decimals coincide. The cubic root of 228161051 is about 611.0552825387.

Subtracting from 228161051 its sum of digits (26), we obtain a square (228161025 = 15105²).

The spelling of 228161051 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, fifty-one".