53999421 has 48 divisors (see below), whose sum is σ = 88646400. Its totient is φ = 29108352.

The previous prime is 53999417. The next prime is 53999431. The reversal of 53999421 is 12499935.

It is not a de Polignac number, because 53999421 - 2² = 53999417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53999401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 225820 + ... + 226058.

It is an arithmetic number, because the mean of its divisors is an integer number (1846800).

Almost surely, 2^53999421 is an apocalyptic number.

It is an amenable number.

53999421 is a deficient number, since it is larger than the sum of its proper divisors (34646979).

53999421 is a wasteful number, since it uses less digits than its factorization.

53999421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 331 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 53999421 is about 7348.4298322839. The cubic root of 53999421 is about 377.9749640483.

The spelling of 53999421 in words is "fifty-three million, nine hundred ninety-nine thousand, four hundred twenty-one".