123816522 has 16 divisors (see below), whose sum is σ = 253392480. Its totient is φ = 40312272.

The previous prime is 123816493. The next prime is 123816529. The reversal of 123816522 is 225618321.

It is a super-2 number, since 2×123816522² = 30661062240352968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123816522.

It is not an unprimeable number, because it can be changed into a prime (123816529) 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, 239697 + ... + 240212.

It is an arithmetic number, because the mean of its divisors is an integer number (15837030).

Almost surely, 2^123816522 is an apocalyptic number.

123816522 is an abundant number, since it is smaller than the sum of its proper divisors (129575958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123816522 is a wasteful number, since it uses less digits than its factorization.

123816522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479957.

The product of its digits is 5760, while the sum is 30.

The square root of 123816522 is about 11127.2872704896. The cubic root of 123816522 is about 498.4170229898.

The spelling of 123816522 in words is "one hundred twenty-three million, eight hundred sixteen thousand, five hundred twenty-two".