16215552 has 200 divisors, whose sum is σ = 53474256. Its totient is φ = 4866048.

The previous prime is 16215547. The next prime is 16215557. The reversal of 16215552 is 25551261.

16215552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16215547) and next prime (16215557).

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

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16215557) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 705013 + ... + 705035.

Almost surely, 2^16215552 is an apocalyptic number.

16215552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16215552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26737128).

16215552 is an abundant number, since it is smaller than the sum of its proper divisors (37258704).

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

16215552 is an equidigital number, since it uses as much as digits as its factorization.

16215552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 45 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 16215552 is about 4026.8538587836. The cubic root of 16215552 is about 253.1107432300.

The spelling of 16215552 in words is "sixteen million, two hundred fifteen thousand, five hundred fifty-two".