257533330 has 16 divisors (see below), whose sum is σ = 470090304. Its totient is φ = 101562160.

The previous prime is 257533303. The next prime is 257533333. The reversal of 257533330 is 33335752.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 257533292 and 257533301.

It is not an unprimeable number, because it can be changed into a prime (257533333) 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, 180652 + ... + 182071.

It is an arithmetic number, because the mean of its divisors is an integer number (29380644).

Almost surely, 2^257533330 is an apocalyptic number.

257533330 is a deficient number, since it is larger than the sum of its proper divisors (212556974).

257533330 is a wasteful number, since it uses less digits than its factorization.

257533330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362801.

The product of its (nonzero) digits is 28350, while the sum is 31.

The square root of 257533330 is about 16047.8450266695. The cubic root of 257533330 is about 636.2256115184.

The spelling of 257533330 in words is "two hundred fifty-seven million, five hundred thirty-three thousand, three hundred thirty".