216257534 has 8 divisors (see below), whose sum is σ = 332298288. Its totient is φ = 105491440.

The previous prime is 216257507. The next prime is 216257537. The reversal of 216257534 is 435752612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×216257534² = 93534642023522312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216257494 and 216257503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216257537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318562 + ... + 1318725.

It is an arithmetic number, because the mean of its divisors is an integer number (41537286).

Almost surely, 2^216257534 is an apocalyptic number.

216257534 is a deficient number, since it is larger than the sum of its proper divisors (116040754).

216257534 is a wasteful number, since it uses less digits than its factorization.

216257534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637330.

The product of its digits is 50400, while the sum is 35.

The square root of 216257534 is about 14705.6973313067. The cubic root of 216257534 is about 600.2383627002.

The spelling of 216257534 in words is "two hundred sixteen million, two hundred fifty-seven thousand, five hundred thirty-four".