605135551 has 4 divisors (see below), whose sum is σ = 608003704. Its totient is φ = 602267400.

The previous prime is 605135533. The next prime is 605135563. The reversal of 605135551 is 155531506.

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 605135551 - 2⁷ = 605135423 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 (605135501) 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, 1433760 + ... + 1434181.

It is an arithmetic number, because the mean of its divisors is an integer number (152000926).

Almost surely, 2^605135551 is an apocalyptic number.

605135551 is a deficient number, since it is larger than the sum of its proper divisors (2868153).

605135551 is a wasteful number, since it uses less digits than its factorization.

605135551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868152.

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 605135551 is about 24599.5030640865. The cubic root of 605135551 is about 845.8322162965.

The spelling of 605135551 in words is "six hundred five million, one hundred thirty-five thousand, five hundred fifty-one".