257155143 has 32 divisors (see below), whose sum is σ = 405511680. Its totient is φ = 141886080.

The previous prime is 257155121. The next prime is 257155147. The reversal of 257155143 is 341551752.

It is not a de Polignac number, because 257155143 - 2⁶ = 257155079 is a prime.

It is a super-2 number, since 2×257155143² = 132257535142700898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257155147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106813 + ... + 109193.

It is an arithmetic number, because the mean of its divisors is an integer number (12672240).

Almost surely, 2^257155143 is an apocalyptic number.

257155143 is a deficient number, since it is larger than the sum of its proper divisors (148356537).

257155143 is a wasteful number, since it uses less digits than its factorization.

257155143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567.

The product of its digits is 21000, while the sum is 33.

The square root of 257155143 is about 16036.0575890709. The cubic root of 257155143 is about 635.9140270839.

The spelling of 257155143 in words is "two hundred fifty-seven million, one hundred fifty-five thousand, one hundred forty-three".