257223502 has 4 divisors (see below), whose sum is σ = 385835256. Its totient is φ = 128611750.

The previous prime is 257223487. The next prime is 257223521. The reversal of 257223502 is 205322752.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×257223502² = 132327859962288008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64305874 + ... + 64305877.

It is an arithmetic number, because the mean of its divisors is an integer number (96458814).

Almost surely, 2^257223502 is an apocalyptic number.

257223502 is a deficient number, since it is larger than the sum of its proper divisors (128611754).

257223502 is a wasteful number, since it uses less digits than its factorization.

257223502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128611753.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 257223502 is about 16038.1888628361. The cubic root of 257223502 is about 635.9703699789.

The spelling of 257223502 in words is "two hundred fifty-seven million, two hundred twenty-three thousand, five hundred two".