228492531 has 12 divisors (see below), whose sum is σ = 330289960. Its totient is φ = 152215200.

The previous prime is 228492527. The next prime is 228492547. The reversal of 228492531 is 135294822.

It is a happy number.

It is not a de Polignac number, because 228492531 - 2² = 228492527 is a prime.

It is a super-2 number, since 2×228492531² = 104417673445571922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228492571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4431 + ... + 21831.

Almost surely, 2^228492531 is an apocalyptic number.

228492531 is a deficient number, since it is larger than the sum of its proper divisors (101797429).

228492531 is a wasteful number, since it uses less digits than its factorization.

228492531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18866 (or 18863 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 228492531 is about 15115.9694032503. The cubic root of 228492531 is about 611.3510598585.

The spelling of 228492531 in words is "two hundred twenty-eight million, four hundred ninety-two thousand, five hundred thirty-one".