53021263 has 4 divisors (see below), whose sum is σ = 53546328. Its totient is φ = 52496200.

The previous prime is 53021239. The next prime is 53021291. The reversal of 53021263 is 36212035.

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 53021263 - 2⁵ = 53021231 is a prime.

It is a super-2 number, since 2×53021263² = 5622508660230338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53021363) 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, 262381 + ... + 262582.

It is an arithmetic number, because the mean of its divisors is an integer number (13386582).

Almost surely, 2^53021263 is an apocalyptic number.

53021263 is a deficient number, since it is larger than the sum of its proper divisors (525065).

53021263 is a wasteful number, since it uses less digits than its factorization.

53021263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525064.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 53021263 is about 7281.5700916767. The cubic root of 53021263 is about 375.6788013500.

Adding to 53021263 its reverse (36212035), we get a palindrome (89233298).

The spelling of 53021263 in words is "fifty-three million, twenty-one thousand, two hundred sixty-three".