31054021 has 2 divisors, whose sum is σ = 31054022. Its totient is φ = 31054020.

The previous prime is 31053977. The next prime is 31054027. The reversal of 31054021 is 12045013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28836900 + 2217121 = 5370^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 31054021 - 2¹¹ = 31051973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31053986 and 31054004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31054027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15527010 + 15527011.

It is an arithmetic number, because the mean of its divisors is an integer number (15527011).

Almost surely, 2^31054021 is an apocalyptic number.

It is an amenable number.

31054021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31054021 is an equidigital number, since it uses as much as digits as its factorization.

31054021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 31054021 is about 5572.6134802263. The cubic root of 31054021 is about 314.3204330299.

Adding to 31054021 its reverse (12045013), we get a palindrome (43099034).

The spelling of 31054021 in words is "thirty-one million, fifty-four thousand, twenty-one".