253561533 has 4 divisors (see below), whose sum is σ = 338082048. Its totient is φ = 169041020.

The previous prime is 253561531. The next prime is 253561537. The reversal of 253561533 is 335165352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253561533 - 2¹ = 253561531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253561494 and 253561503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253561531) 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, 42260253 + ... + 42260258.

It is an arithmetic number, because the mean of its divisors is an integer number (84520512).

Almost surely, 2^253561533 is an apocalyptic number.

It is an amenable number.

253561533 is a deficient number, since it is larger than the sum of its proper divisors (84520515).

253561533 is an equidigital number, since it uses as much as digits as its factorization.

253561533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84520514.

The product of its digits is 40500, while the sum is 33.

The square root of 253561533 is about 15923.6155756160. The cubic root of 253561533 is about 632.9379308177.

The spelling of 253561533 in words is "two hundred fifty-three million, five hundred sixty-one thousand, five hundred thirty-three".