54021630 has 32 divisors (see below), whose sum is σ = 139626144. Its totient is φ = 13297536.

The previous prime is 54021619. The next prime is 54021637. The reversal of 54021630 is 3612045.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 54021597 and 54021606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54021637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68869 + ... + 69648.

It is an arithmetic number, because the mean of its divisors is an integer number (4363317).

Almost surely, 2^54021630 is an apocalyptic number.

54021630 is an abundant number, since it is smaller than the sum of its proper divisors (85604514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54021630 is a wasteful number, since it uses less digits than its factorization.

54021630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138540.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 54021630 is about 7349.9408160882. The cubic root of 54021630 is about 378.0267750693.

Adding to 54021630 its reverse (3612045), we get a palindrome (57633675).

The spelling of 54021630 in words is "fifty-four million, twenty-one thousand, six hundred thirty".