201031345 has 4 divisors (see below), whose sum is σ = 241237620. Its totient is φ = 160825072.

The previous prime is 201031319. The next prime is 201031351. The reversal of 201031345 is 543130102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543130102 = 2 ⋅271565051.

It can be written as a sum of positive squares in 2 ways, for example, as 78287104 + 122744241 = 8848^2 + 11079^2 .

It is a cyclic number.

It is not a de Polignac number, because 201031345 - 2¹³ = 201023153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20103130 + ... + 20103139.

It is an arithmetic number, because the mean of its divisors is an integer number (60309405).

Almost surely, 2^201031345 is an apocalyptic number.

It is an amenable number.

201031345 is a deficient number, since it is larger than the sum of its proper divisors (40206275).

201031345 is an equidigital number, since it uses as much as digits as its factorization.

201031345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40206274.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 201031345 is about 14178.5522885801. The cubic root of 201031345 is about 585.8070483798.

Subtracting from 201031345 its sum of digits (19), we obtain a triangular number (201031326 = T₂₀₀₅₁).

Adding to 201031345 its reverse (543130102), we get a palindrome (744161447).

The spelling of 201031345 in words is "two hundred one million, thirty-one thousand, three hundred forty-five".