53261021 has 8 divisors (see below), whose sum is σ = 58313088. Its totient is φ = 48244000.

The previous prime is 53261003. The next prime is 53261029. The reversal of 53261021 is 12016235.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53261021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53260984 and 53261002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53261029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5525 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (7289136).

Almost surely, 2^53261021 is an apocalyptic number.

It is an amenable number.

53261021 is a deficient number, since it is larger than the sum of its proper divisors (5052067).

53261021 is a wasteful number, since it uses less digits than its factorization.

53261021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17523.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 53261021 is about 7298.0148670717. The cubic root of 53261021 is about 376.2442133303.

Adding to 53261021 its reverse (12016235), we get a palindrome (65277256).

The spelling of 53261021 in words is "fifty-three million, two hundred sixty-one thousand, twenty-one".