228372545 has 8 divisors (see below), whose sum is σ = 274314600. Its totient is φ = 182519680.

The previous prime is 228372499. The next prime is 228372553. The reversal of 228372545 is 545273822.

It is a Cunningham number, because it is equal to 15112²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 24482704 + 203889841 = 4948^2 + 14279^2 .

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

It is not a de Polignac number, because 228372545 - 2¹⁸ = 228110401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228372499 and 228372508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16526 + ... + 27015.

It is an arithmetic number, because the mean of its divisors is an integer number (34289325).

Almost surely, 2^228372545 is an apocalyptic number.

It is an amenable number.

228372545 is a deficient number, since it is larger than the sum of its proper divisors (45942055).

228372545 is a wasteful number, since it uses less digits than its factorization.

228372545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44595.

The product of its digits is 134400, while the sum is 38.

The square root of 228372545 is about 15112.0000330863. Note that the first 4 decimals coincide. The cubic root of 228372545 is about 611.2440302304.

The spelling of 228372545 in words is "two hundred twenty-eight million, three hundred seventy-two thousand, five hundred forty-five".