216123525145 has 16 divisors (see below), whose sum is σ = 283270011840. Its totient is φ = 156989262400.

The previous prime is 216123525109. The next prime is 216123525181. The reversal of 216123525145 is 541525321612.

It is an interprime number because it is at equal distance from previous prime (216123525109) and next prime (216123525181).

It is not a de Polignac number, because 216123525145 - 2¹¹ = 216123523097 is a prime.

It is a super-2 number, since 2×216123525145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2347975 + ... + 2438284.

It is an arithmetic number, because the mean of its divisors is an integer number (17704375740).

Almost surely, 2^216123525145 is an apocalyptic number.

It is an amenable number.

216123525145 is a deficient number, since it is larger than the sum of its proper divisors (67146486695).

216123525145 is a wasteful number, since it uses less digits than its factorization.

216123525145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787096.

The product of its digits is 72000, while the sum is 37.

Adding to 216123525145 its reverse (541525321612), we get a palindrome (757648846757).

The spelling of 216123525145 in words is "two hundred sixteen billion, one hundred twenty-three million, five hundred twenty-five thousand, one hundred forty-five".