228745137 has 8 divisors (see below), whose sum is σ = 313236736. Its totient is φ = 148375152.

The previous prime is 228745133. The next prime is 228745147. The reversal of 228745137 is 731547822.

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

It is not a de Polignac number, because 228745137 - 2² = 228745133 is a prime.

It is a super-2 number, since 2×228745137² = 104648675402297538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228745095 and 228745104.

It is not an unprimeable number, because it can be changed into a prime (228745133) 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, 1030273 + ... + 1030494.

It is an arithmetic number, because the mean of its divisors is an integer number (39154592).

Almost surely, 2^228745137 is an apocalyptic number.

It is an amenable number.

228745137 is a deficient number, since it is larger than the sum of its proper divisors (84491599).

228745137 is a wasteful number, since it uses less digits than its factorization.

228745137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060807.

The product of its digits is 94080, while the sum is 39.

The square root of 228745137 is about 15124.3226955788. The cubic root of 228745137 is about 611.5762664485.

The spelling of 228745137 in words is "two hundred twenty-eight million, seven hundred forty-five thousand, one hundred thirty-seven".