216607725051 has 4 divisors (see below), whose sum is σ = 288810300072. Its totient is φ = 144405150032.

The previous prime is 216607725049. The next prime is 216607725053. The reversal of 216607725051 is 150527706612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (216607725049) and next prime (216607725053).

It is a cyclic number.

It is not a de Polignac number, because 216607725051 - 2¹ = 216607725049 is a prime.

It is a super-2 number, since 2×216607725051² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216607724994 and 216607725012.

It is not an unprimeable number, because it can be changed into a prime (216607725053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36101287506 + ... + 36101287511.

It is an arithmetic number, because the mean of its divisors is an integer number (72202575018).

Almost surely, 2^216607725051 is an apocalyptic number.

216607725051 is a deficient number, since it is larger than the sum of its proper divisors (72202575021).

216607725051 is an equidigital number, since it uses as much as digits as its factorization.

216607725051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72202575020.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 216607725051 in words is "two hundred sixteen billion, six hundred seven million, seven hundred twenty-five thousand, fifty-one".