220031135145 has 24 divisors (see below), whose sum is σ = 381537004992. Its totient is φ = 117303876000.

The previous prime is 220031135117. The next prime is 220031135153. The reversal of 220031135145 is 541531130022.

220031135145 is a `hidden beast` number, since 2 + 200 + 311 + 3 + 5 + 145 = 666.

It is not a de Polignac number, because 220031135145 - 2¹⁰ = 220031134121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 843571 + ... + 1073160.

It is an arithmetic number, because the mean of its divisors is an integer number (15897375208).

Almost surely, 2^220031135145 is an apocalyptic number.

It is an amenable number.

220031135145 is a deficient number, since it is larger than the sum of its proper divisors (161505869847).

220031135145 is a wasteful number, since it uses less digits than its factorization.

220031135145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919293 (or 1919290 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 220031135145 its reverse (541531130022), we get a palindrome (761562265167).

The spelling of 220031135145 in words is "two hundred twenty billion, thirty-one million, one hundred thirty-five thousand, one hundred forty-five".