53090821 has 8 divisors (see below), whose sum is σ = 60809984. Its totient is φ = 45405360.

The previous prime is 53090809. The next prime is 53090833. The reversal of 53090821 is 12809035.

It is an interprime number because it is at equal distance from previous prime (53090809) and next prime (53090833).

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

It is not a de Polignac number, because 53090821 - 2⁹ = 53090309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53090821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53090861) 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, 4950 + ... + 11431.

It is an arithmetic number, because the mean of its divisors is an integer number (7601248).

Almost surely, 2^53090821 is an apocalyptic number.

It is an amenable number.

53090821 is a deficient number, since it is larger than the sum of its proper divisors (7719163).

53090821 is a wasteful number, since it uses less digits than its factorization.

53090821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16851.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 53090821 is about 7286.3448312580. The cubic root of 53090821 is about 375.8430124968.

Adding to 53090821 its reverse (12809035), we get a palindrome (65899856).

The spelling of 53090821 in words is "fifty-three million, ninety thousand, eight hundred twenty-one".