253454521 has 4 divisors (see below), whose sum is σ = 255304692. Its totient is φ = 251604352.

The previous prime is 253454491. The next prime is 253454561. The reversal of 253454521 is 125454352.

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 101203600 + 152250921 = 10060^2 + 12339^2 .

It is a cyclic number.

It is not a de Polignac number, because 253454521 - 2¹³ = 253446329 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253454561) 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, 924880 + ... + 925153.

It is an arithmetic number, because the mean of its divisors is an integer number (63826173).

Almost surely, 2^253454521 is an apocalyptic number.

It is an amenable number.

253454521 is a deficient number, since it is larger than the sum of its proper divisors (1850171).

253454521 is a wasteful number, since it uses less digits than its factorization.

253454521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850170.

The product of its digits is 24000, while the sum is 31.

The square root of 253454521 is about 15920.2550544895. The cubic root of 253454521 is about 632.8488775036.

The spelling of 253454521 in words is "two hundred fifty-three million, four hundred fifty-four thousand, five hundred twenty-one".