123545215331 has 16 divisors (see below), whose sum is σ = 128717208000. Its totient is φ = 118434691200.

The previous prime is 123545215309. The next prime is 123545215333. The reversal of 123545215331 is 133512545321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123545215331 - 2²² = 123541021027 is a prime.

It is a super-2 number, since 2×123545215331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123545215291 and 123545215300.

It is not an unprimeable number, because it can be changed into a prime (123545215333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14129621 + ... + 14138361.

It is an arithmetic number, because the mean of its divisors is an integer number (8044825500).

Almost surely, 2^123545215331 is an apocalyptic number.

123545215331 is a deficient number, since it is larger than the sum of its proper divisors (5171992669).

123545215331 is a wasteful number, since it uses less digits than its factorization.

123545215331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12190.

The product of its digits is 54000, while the sum is 35.

The spelling of 123545215331 in words is "one hundred twenty-three billion, five hundred forty-five million, two hundred fifteen thousand, three hundred thirty-one".