253125551 has 4 divisors (see below), whose sum is σ = 289286352. Its totient is φ = 216964752.

The previous prime is 253125527. The next prime is 253125569. The reversal of 253125551 is 155521352.

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 253125551 - 2¹⁰ = 253124527 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 (253125151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18080390 + ... + 18080403.

It is an arithmetic number, because the mean of its divisors is an integer number (72321588).

Almost surely, 2^253125551 is an apocalyptic number.

253125551 is a deficient number, since it is larger than the sum of its proper divisors (36160801).

253125551 is an equidigital number, since it uses as much as digits as its factorization.

253125551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36160800.

The product of its digits is 7500, while the sum is 29.

The square root of 253125551 is about 15909.9198929473. The cubic root of 253125551 is about 632.5749579700.

It can be divided in two parts, 2531 and 25551, that added together give a palindrome (28082).

The spelling of 253125551 in words is "two hundred fifty-three million, one hundred twenty-five thousand, five hundred fifty-one".