31142901 has 4 divisors (see below), whose sum is σ = 41523872. Its totient is φ = 20761932.

The previous prime is 31142899. The next prime is 31142921. The reversal of 31142901 is 10924113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10924113 = 3 ⋅3641371.

It is not a de Polignac number, because 31142901 - 2¹ = 31142899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5190481 + ... + 5190486.

It is an arithmetic number, because the mean of its divisors is an integer number (10380968).

Almost surely, 2^31142901 is an apocalyptic number.

It is an amenable number.

31142901 is a deficient number, since it is larger than the sum of its proper divisors (10380971).

31142901 is a wasteful number, since it uses less digits than its factorization.

31142901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10380970.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 31142901 is about 5580.5824964783. The cubic root of 31142901 is about 314.6200205311.

The spelling of 31142901 in words is "thirty-one million, one hundred forty-two thousand, nine hundred one".