53321990 has 16 divisors (see below), whose sum is σ = 96470352. Its totient is φ = 21219744.

The previous prime is 53321977. The next prime is 53321993. The reversal of 53321990 is 9912335.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53321993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11564 + ... + 15503.

It is an arithmetic number, because the mean of its divisors is an integer number (6029397).

Almost surely, 2^53321990 is an apocalyptic number.

53321990 is a deficient number, since it is larger than the sum of its proper divisors (43148362).

53321990 is a wasteful number, since it uses less digits than its factorization.

53321990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27271.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 53321990 is about 7302.1907671602. The cubic root of 53321990 is about 376.3877234469.

The spelling of 53321990 in words is "fifty-three million, three hundred twenty-one thousand, nine hundred ninety".