216375741 has 12 divisors (see below), whose sum is σ = 320990332. Its totient is φ = 140351616.

The previous prime is 216375739. The next prime is 216375767. The reversal of 216375741 is 147573612.

It is a happy number.

216375741 is a `hidden beast` number, since 21 + 63 + 7 + 574 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 146168100 + 70207641 = 12090^2 + 8379^2 .

It is not a de Polignac number, because 216375741 - 2¹ = 216375739 is a prime.

It is a super-2 number, since 2×216375741² = 93636922586598162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216375696 and 216375705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216375701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324556 + ... + 325221.

Almost surely, 2^216375741 is an apocalyptic number.

It is an amenable number.

216375741 is a deficient number, since it is larger than the sum of its proper divisors (104614591).

216375741 is a wasteful number, since it uses less digits than its factorization.

216375741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649820 (or 649817 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 216375741 is about 14709.7158708114. The cubic root of 216375741 is about 600.3477067944.

The spelling of 216375741 in words is "two hundred sixteen million, three hundred seventy-five thousand, seven hundred forty-one".