53221755 has 16 divisors (see below), whose sum is σ = 89637120. Its totient is φ = 26890848.

The previous prime is 53221711. The next prime is 53221771. The reversal of 53221755 is 55712235.

It is not a de Polignac number, because 53221755 - 2⁶ = 53221691 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93087 + ... + 93656.

It is an arithmetic number, because the mean of its divisors is an integer number (5602320).

Almost surely, 2^53221755 is an apocalyptic number.

53221755 is a deficient number, since it is larger than the sum of its proper divisors (36415365).

53221755 is a wasteful number, since it uses less digits than its factorization.

53221755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186770.

The product of its digits is 10500, while the sum is 30.

The square root of 53221755 is about 7295.3241874505. The cubic root of 53221755 is about 376.1517302032.

The spelling of 53221755 in words is "fifty-three million, two hundred twenty-one thousand, seven hundred fifty-five".