253545551 has 6 divisors (see below), whose sum is σ = 294940800. Its totient is φ = 217324716.

The previous prime is 253545541. The next prime is 253545553. The reversal of 253545551 is 155545352.

It is not a de Polignac number, because 253545551 - 2²² = 249351247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253545553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2587151 + ... + 2587248.

It is an arithmetic number, because the mean of its divisors is an integer number (49156800).

Almost surely, 2^253545551 is an apocalyptic number.

253545551 is a deficient number, since it is larger than the sum of its proper divisors (41395249).

253545551 is an equidigital number, since it uses as much as digits as its factorization.

253545551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174413 (or 5174406 counting only the distinct ones).

The product of its digits is 75000, while the sum is 35.

The square root of 253545551 is about 15923.1137344428. The cubic root of 253545551 is about 632.9246324985.

The spelling of 253545551 in words is "two hundred fifty-three million, five hundred forty-five thousand, five hundred fifty-one".