53020387 has 4 divisors (see below), whose sum is σ = 60594736. Its totient is φ = 45446040.

The previous prime is 53020379. The next prime is 53020403. The reversal of 53020387 is 78302035.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53020387 - 2³ = 53020379 is a prime.

It is a super-2 number, since 2×53020387² = 5622322875259538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53020307) 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, 3787164 + ... + 3787177.

It is an arithmetic number, because the mean of its divisors is an integer number (15148684).

Almost surely, 2^53020387 is an apocalyptic number.

53020387 is a deficient number, since it is larger than the sum of its proper divisors (7574349).

53020387 is an equidigital number, since it uses as much as digits as its factorization.

53020387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574348.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 53020387 is about 7281.5099395661. The cubic root of 53020387 is about 375.6767323911.

The spelling of 53020387 in words is "fifty-three million, twenty thousand, three hundred eighty-seven".