257948111 has 4 divisors (see below), whose sum is σ = 258247872. Its totient is φ = 257648352.

The previous prime is 257948107. The next prime is 257948143. The reversal of 257948111 is 111849752.

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

It is a cyclic number.

It is not a de Polignac number, because 257948111 - 2² = 257948107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257948101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148586 + ... + 150311.

It is an arithmetic number, because the mean of its divisors is an integer number (64561968).

Almost surely, 2^257948111 is an apocalyptic number.

257948111 is a deficient number, since it is larger than the sum of its proper divisors (299761).

257948111 is an equidigital number, since it uses as much as digits as its factorization.

257948111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299760.

The product of its digits is 20160, while the sum is 38.

The square root of 257948111 is about 16060.7630889693. The cubic root of 257948111 is about 636.5669948346.

The spelling of 257948111 in words is "two hundred fifty-seven million, nine hundred forty-eight thousand, one hundred eleven".