216753057 has 8 divisors (see below), whose sum is σ = 321115680. Its totient is φ = 144502020.

The previous prime is 216753041. The next prime is 216753091. The reversal of 216753057 is 750357612.

It is not a de Polignac number, because 216753057 - 2⁴ = 216753041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216753037) 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, 4013919 + ... + 4013972.

It is an arithmetic number, because the mean of its divisors is an integer number (40139460).

Almost surely, 2^216753057 is an apocalyptic number.

216753057 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

216753057 is a deficient number, since it is larger than the sum of its proper divisors (104362623).

216753057 is an equidigital number, since it uses as much as digits as its factorization.

216753057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8027900 (or 8027894 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 216753057 is about 14722.5356851325. The cubic root of 216753057 is about 600.6964662451.

The spelling of 216753057 in words is "two hundred sixteen million, seven hundred fifty-three thousand, fifty-seven".