31441021 has 4 divisors (see below), whose sum is σ = 31504032. Its totient is φ = 31378012.

The previous prime is 31440961. The next prime is 31441043. The reversal of 31441021 is 12014413.

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: 12014413 = 73 ⋅164581.

It is a cyclic number.

It is not a de Polignac number, because 31441021 - 2¹³ = 31432829 is a prime.

It is a super-3 number, since 3×31441021³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31440986 and 31441004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31447021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30751 + ... + 31756.

It is an arithmetic number, because the mean of its divisors is an integer number (7876008).

Almost surely, 2^31441021 is an apocalyptic number.

It is an amenable number.

31441021 is a deficient number, since it is larger than the sum of its proper divisors (63011).

31441021 is an equidigital number, since it uses as much as digits as its factorization.

31441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63010.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31441021 is about 5607.2293514712. The cubic root of 31441021 is about 315.6207495555.

Adding to 31441021 its reverse (12014413), we get a palindrome (43455434).

The spelling of 31441021 in words is "thirty-one million, four hundred forty-one thousand, twenty-one".