201031042 has 4 divisors (see below), whose sum is σ = 301546566. Its totient is φ = 100515520.

The previous prime is 201031013. The next prime is 201031043. The reversal of 201031042 is 240130102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240130102 = 2 ⋅120065051.

It can be written as a sum of positive squares in only one way, i.e., 109809441 + 91221601 = 10479^2 + 9551^2 .

It is not an unprimeable number, because it can be changed into a prime (201031043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50257759 + ... + 50257762.

Almost surely, 2^201031042 is an apocalyptic number.

201031042 is a deficient number, since it is larger than the sum of its proper divisors (100515524).

201031042 is a wasteful number, since it uses less digits than its factorization.

201031042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100515523.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 201031042 is about 14178.5416034231. The cubic root of 201031042 is about 585.8067540648.

Adding to 201031042 its reverse (240130102), we get a palindrome (441161144).

The spelling of 201031042 in words is "two hundred one million, thirty-one thousand, forty-two".