253151509 has 4 divisors (see below), whose sum is σ = 272624716. Its totient is φ = 233678304.

The previous prime is 253151453. The next prime is 253151531. The reversal of 253151509 is 905151352.

253151509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 35736484 + 217415025 = 5978^2 + 14745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253151509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253151599) 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, 9736584 + ... + 9736609.

It is an arithmetic number, because the mean of its divisors is an integer number (68156179).

Almost surely, 2^253151509 is an apocalyptic number.

It is an amenable number.

253151509 is a deficient number, since it is larger than the sum of its proper divisors (19473207).

253151509 is a wasteful number, since it uses less digits than its factorization.

253151509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19473206.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 253151509 is about 15910.7356523826. The cubic root of 253151509 is about 632.5965807304.

The spelling of 253151509 in words is "two hundred fifty-three million, one hundred fifty-one thousand, five hundred nine".