53021004 has 12 divisors (see below), whose sum is σ = 123715704. Its totient is φ = 17673664.

The previous prime is 53020969. The next prime is 53021009. The reversal of 53021004 is 40012035.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×53021004² = 5622453730336032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53021009) 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, 2209197 + ... + 2209220.

It is an arithmetic number, because the mean of its divisors is an integer number (10309642).

Almost surely, 2^53021004 is an apocalyptic number.

It is an amenable number.

53021004 is an abundant number, since it is smaller than the sum of its proper divisors (70694700).

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

53021004 is a wasteful number, since it uses less digits than its factorization.

53021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418424 (or 4418422 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 53021004 is about 7281.5523070290. The cubic root of 53021004 is about 375.6781896397.

Adding to 53021004 its reverse (40012035), we get a palindrome (93033039).

The spelling of 53021004 in words is "fifty-three million, twenty-one thousand, four".