216742025 has 24 divisors (see below), whose sum is σ = 284505600. Its totient is φ = 163339200.

The previous prime is 216742013. The next prime is 216742039. The reversal of 216742025 is 520247612.

It is a happy number.

216742025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216742025 - 2¹² = 216737929 is a prime.

It is a super-2 number, since 2×216742025² = 93954210802201250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89531 + ... + 91919.

It is an arithmetic number, because the mean of its divisors is an integer number (11854400).

Almost surely, 2^216742025 is an apocalyptic number.

216742025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216742025 is a deficient number, since it is larger than the sum of its proper divisors (67763575).

216742025 is a wasteful number, since it uses less digits than its factorization.

216742025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609 (or 2604 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 216742025 is about 14722.1610166443. The cubic root of 216742025 is about 600.6862749304.

Adding to 216742025 its reverse (520247612), we get a palindrome (736989637).

The spelling of 216742025 in words is "two hundred sixteen million, seven hundred forty-two thousand, twenty-five".