601115551 has 4 divisors (see below), whose sum is σ = 601412400. Its totient is φ = 600818704.

The previous prime is 601115549. The next prime is 601115573. The reversal of 601115551 is 155511106.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155511106 = 2 ⋅77755553.

It is a cyclic number.

It is not a de Polignac number, because 601115551 - 2¹ = 601115549 is a prime.

It is a super-2 number, since 2×601115551² = 722679811308067202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601115531) 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, 145366 + ... + 149443.

It is an arithmetic number, because the mean of its divisors is an integer number (150353100).

Almost surely, 2^601115551 is an apocalyptic number.

601115551 is a deficient number, since it is larger than the sum of its proper divisors (296849).

601115551 is a wasteful number, since it uses less digits than its factorization.

601115551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296848.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 601115551 is about 24517.6579427971. The cubic root of 601115551 is about 843.9550595442.

Adding to 601115551 its reverse (155511106), we get a palindrome (756626657).

The spelling of 601115551 in words is "six hundred one million, one hundred fifteen thousand, five hundred fifty-one".