31430101 has 4 divisors (see below), whose sum is σ = 31472704. Its totient is φ = 31387500.

The previous prime is 31430081. The next prime is 31430117. The reversal of 31430101 is 10103413.

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.

It is a cyclic number.

It is not a de Polignac number, because 31430101 - 2⁷ = 31429973 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 (31430701) 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, 20175 + ... + 21676.

It is an arithmetic number, because the mean of its divisors is an integer number (7868176).

Almost surely, 2^31430101 is an apocalyptic number.

It is an amenable number.

31430101 is a deficient number, since it is larger than the sum of its proper divisors (42603).

31430101 is an equidigital number, since it uses as much as digits as its factorization.

31430101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42602.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 31430101 is about 5606.2555239661. The cubic root of 31430101 is about 315.5842051774.

Adding to 31430101 its reverse (10103413), we get a palindrome (41533514).

The spelling of 31430101 in words is "thirty-one million, four hundred thirty thousand, one hundred one".