53455021 has 16 divisors (see below), whose sum is σ = 58399488. Its totient is φ = 48729600.

The previous prime is 53455019. The next prime is 53455049. The reversal of 53455021 is 12055435.

It is a cyclic number.

It is not a de Polignac number, because 53455021 - 2¹ = 53455019 is a prime.

It is a super-2 number, since 2×53455021² = 5714878540220882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53455621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188746 + ... + 189028.

It is an arithmetic number, because the mean of its divisors is an integer number (3649968).

Almost surely, 2^53455021 is an apocalyptic number.

It is an amenable number.

53455021 is a deficient number, since it is larger than the sum of its proper divisors (4944467).

53455021 is a wasteful number, since it uses less digits than its factorization.

53455021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 53455021 is about 7311.2940715033. The cubic root of 53455021 is about 376.7004752939.

It can be divided in two parts, 534 and 55021, that added together give a palindrome (55555).

The spelling of 53455021 in words is "fifty-three million, four hundred fifty-five thousand, twenty-one".