53021215 has 24 divisors (see below), whose sum is σ = 72968688. Its totient is φ = 36840960.

The previous prime is 53021201. The next prime is 53021219. The reversal of 53021215 is 51212035.

It is not a de Polignac number, because 53021215 - 2⁵ = 53021183 is a prime.

It is a super-2 number, since 2×53021215² = 5622498480152450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53021192 and 53021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53021219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12520 + ... + 16210.

It is an arithmetic number, because the mean of its divisors is an integer number (3040362).

Almost surely, 2^53021215 is an apocalyptic number.

53021215 is a deficient number, since it is larger than the sum of its proper divisors (19947473).

53021215 is a wasteful number, since it uses less digits than its factorization.

53021215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739 (or 3726 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 53021215 is about 7281.5667956835. The cubic root of 53021215 is about 375.6786879830.

The spelling of 53021215 in words is "fifty-three million, twenty-one thousand, two hundred fifteen".