51054021 has 6 divisors (see below), whose sum is σ = 73744710. Its totient is φ = 34036008.

The previous prime is 51054019. The next prime is 51054023. The reversal of 51054021 is 12045015.

It is an interprime number because it is at equal distance from previous prime (51054019) and next prime (51054023).

It can be written as a sum of positive squares in only one way, i.e., 26936100 + 24117921 = 5190^2 + 4911^2 .

It is not a de Polignac number, because 51054021 - 2¹ = 51054019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51053985 and 51054003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51054023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2836326 + ... + 2836343.

It is an arithmetic number, because the mean of its divisors is an integer number (12290785).

Almost surely, 2^51054021 is an apocalyptic number.

It is an amenable number.

51054021 is a deficient number, since it is larger than the sum of its proper divisors (22690689).

51054021 is a wasteful number, since it uses less digits than its factorization.

51054021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672675 (or 5672672 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51054021 is about 7145.2096540270. The cubic root of 51054021 is about 370.9738673795.

Adding to 51054021 its reverse (12045015), we get a palindrome (63099036).

The spelling of 51054021 in words is "fifty-one million, fifty-four thousand, twenty-one".