123228513 has 16 divisors (see below), whose sum is σ = 183792000. Its totient is φ = 81598320.

The previous prime is 123228491. The next prime is 123228541. The reversal of 123228513 is 315822321.

123228513 is a `hidden beast` number, since 123 + 2 + 28 + 513 = 666.

It is not a de Polignac number, because 123228513 - 2¹⁷ = 123097441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123228593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11293 + ... + 19338.

It is an arithmetic number, because the mean of its divisors is an integer number (11487000).

Almost surely, 2^123228513 is an apocalyptic number.

It is an amenable number.

123228513 is a deficient number, since it is larger than the sum of its proper divisors (60563487).

123228513 is a wasteful number, since it uses less digits than its factorization.

123228513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30789 (or 30783 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 123228513 is about 11100.8338875960. The cubic root of 123228513 is about 497.6267707210.

The spelling of 123228513 in words is "one hundred twenty-three million, two hundred twenty-eight thousand, five hundred thirteen".