257222513 has 8 divisors (see below), whose sum is σ = 271000800. Its totient is φ = 243468288.

The previous prime is 257222509. The next prime is 257222519. The reversal of 257222513 is 315222752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257222513 - 2² = 257222509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257222519) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 18545 + ... + 29297.

It is an arithmetic number, because the mean of its divisors is an integer number (33875100).

Almost surely, 2^257222513 is an apocalyptic number.

It is an amenable number.

257222513 is a deficient number, since it is larger than the sum of its proper divisors (13778287).

257222513 is a wasteful number, since it uses less digits than its factorization.

257222513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12031.

The product of its digits is 8400, while the sum is 29.

The square root of 257222513 is about 16038.1580301480. The cubic root of 257222513 is about 635.9695548959.

The spelling of 257222513 in words is "two hundred fifty-seven million, two hundred twenty-two thousand, five hundred thirteen".