257271531321 has 8 divisors (see below), whose sum is σ = 392032809664. Its totient is φ = 147012303600.

The previous prime is 257271531301. The next prime is 257271531353. The reversal of 257271531321 is 123135172752.

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

It is not a de Polignac number, because 257271531321 - 2¹⁷ = 257271400249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257271531321.

It is not an unprimeable number, because it can be changed into a prime (257271531301) 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, 6125512630 + ... + 6125512671.

It is an arithmetic number, because the mean of its divisors is an integer number (49004101208).

Almost surely, 2^257271531321 is an apocalyptic number.

257271531321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

257271531321 is a deficient number, since it is larger than the sum of its proper divisors (134761278343).

257271531321 is a wasteful number, since it uses less digits than its factorization.

257271531321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12251025311.

The product of its digits is 88200, while the sum is 39.

The spelling of 257271531321 in words is "two hundred fifty-seven billion, two hundred seventy-one million, five hundred thirty-one thousand, three hundred twenty-one".