254135551 has 4 divisors (see below), whose sum is σ = 262333504. Its totient is φ = 245937600.

The previous prime is 254135549. The next prime is 254135569. The reversal of 254135551 is 155531452.

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 254135551 - 2¹ = 254135549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 8197921 = 254135551 / (2 + 5 + 4 + 1 + 3 + 5 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254135501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4098930 + ... + 4098991.

It is an arithmetic number, because the mean of its divisors is an integer number (65583376).

Almost surely, 2^254135551 is an apocalyptic number.

254135551 is a deficient number, since it is larger than the sum of its proper divisors (8197953).

254135551 is an equidigital number, since it uses as much as digits as its factorization.

254135551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8197952.

The product of its digits is 15000, while the sum is 31.

The square root of 254135551 is about 15941.6294963846. The cubic root of 254135551 is about 633.4151903123.

The spelling of 254135551 in words is "two hundred fifty-four million, one hundred thirty-five thousand, five hundred fifty-one".