31301421 has 8 divisors (see below), whose sum is σ = 42118560. Its totient is φ = 20675952.

The previous prime is 31301419. The next prime is 31301423. The reversal of 31301421 is 12410313.

It is an interprime number because it is at equal distance from previous prime (31301419) and next prime (31301423).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31301421 - 2¹ = 31301419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31301421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301423) 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 7 ways as a sum of consecutive naturals, for example, 47535 + ... + 48188.

It is an arithmetic number, because the mean of its divisors is an integer number (5264820).

Almost surely, 2^31301421 is an apocalyptic number.

It is an amenable number.

31301421 is a deficient number, since it is larger than the sum of its proper divisors (10817139).

31301421 is a wasteful number, since it uses less digits than its factorization.

31301421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95835.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31301421 is about 5594.7672873856. The cubic root of 31301421 is about 315.1529315351.

Adding to 31301421 its reverse (12410313), we get a palindrome (43711734).

The spelling of 31301421 in words is "thirty-one million, three hundred one thousand, four hundred twenty-one".