16123557 has 4 divisors (see below), whose sum is σ = 21498080. Its totient is φ = 10749036.

The previous prime is 16123553. The next prime is 16123559. The reversal of 16123557 is 75532161.

16123557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16123557 - 2² = 16123553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16123553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2687257 + ... + 2687262.

It is an arithmetic number, because the mean of its divisors is an integer number (5374520).

Almost surely, 2^16123557 is an apocalyptic number.

It is an amenable number.

16123557 is a deficient number, since it is larger than the sum of its proper divisors (5374523).

16123557 is an equidigital number, since it uses as much as digits as its factorization.

16123557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5374522.

The product of its digits is 6300, while the sum is 30.

The square root of 16123557 is about 4015.4149225205. The cubic root of 16123557 is about 252.6311810598.

The spelling of 16123557 in words is "sixteen million, one hundred twenty-three thousand, five hundred fifty-seven".