257086453 has 4 divisors (see below), whose sum is σ = 276862348. Its totient is φ = 237310560.

The previous prime is 257086451. The next prime is 257086463. The reversal of 257086453 is 354680752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 100761444 + 156325009 = 10038^2 + 12503^2 .

It is a cyclic number.

It is not a de Polignac number, because 257086453 - 2¹ = 257086451 is a prime.

It is a super-2 number, since 2×257086453² = 132186888632242418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257086451) 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, 9887928 + ... + 9887953.

It is an arithmetic number, because the mean of its divisors is an integer number (69215587).

Almost surely, 2^257086453 is an apocalyptic number.

It is an amenable number.

257086453 is a deficient number, since it is larger than the sum of its proper divisors (19775895).

257086453 is a wasteful number, since it uses less digits than its factorization.

257086453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19775894.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 257086453 is about 16033.9157101439. The cubic root of 257086453 is about 635.8574013133.

The spelling of 257086453 in words is "two hundred fifty-seven million, eighty-six thousand, four hundred fifty-three".