216262501 has 16 divisors (see below), whose sum is σ = 267387904. Its totient is φ = 170325504.

The previous prime is 216262489. The next prime is 216262511. The reversal of 216262501 is 105262612.

It is a cyclic number.

It is not a de Polignac number, because 216262501 - 2⁵ = 216262469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216262511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14965 + ... + 25621.

It is an arithmetic number, because the mean of its divisors is an integer number (16711744).

Almost surely, 2^216262501 is an apocalyptic number.

It is an amenable number.

216262501 is a deficient number, since it is larger than the sum of its proper divisors (51125403).

216262501 is a wasteful number, since it uses less digits than its factorization.

216262501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10900.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 216262501 is about 14705.8662104617. The cubic root of 216262501 is about 600.2429580871.

The spelling of 216262501 in words is "two hundred sixteen million, two hundred sixty-two thousand, five hundred one".