31011421 has 8 divisors (see below), whose sum is σ = 35480000. Its totient is φ = 26552448.

The previous prime is 31011391. The next prime is 31011437. The reversal of 31011421 is 12411013.

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

It is a cyclic number.

It is not a de Polignac number, because 31011421 - 2¹¹ = 31009373 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 (31015421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6970 + ... + 10516.

It is an arithmetic number, because the mean of its divisors is an integer number (4435000).

Almost surely, 2^31011421 is an apocalyptic number.

It is an amenable number.

31011421 is a deficient number, since it is larger than the sum of its proper divisors (4468579).

31011421 is a wasteful number, since it uses less digits than its factorization.

31011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 31011421 is about 5568.7899044586. The cubic root of 31011421 is about 314.1766386836.

Adding to 31011421 its reverse (12411013), we get a palindrome (43422434).

The spelling of 31011421 in words is "thirty-one million, eleven thousand, four hundred twenty-one".