601551081 has 12 divisors (see below), whose sum is σ = 869476608. Its totient is φ = 400771224.

The previous prime is 601551017. The next prime is 601551101. The reversal of 601551081 is 180155106.

601551081 is a `hidden beast` number, since 60 + 15 + 510 + 81 = 666.

It is not a de Polignac number, because 601551081 - 2⁶ = 601551017 is a prime.

It is a super-2 number, since 2×601551081² = 723727406104537122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (601551481) 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 11 ways as a sum of consecutive naturals, for example, 6865 + ... + 35358.

It is an arithmetic number, because the mean of its divisors is an integer number (72456384).

Almost surely, 2^601551081 is an apocalyptic number.

It is an amenable number.

601551081 is a deficient number, since it is larger than the sum of its proper divisors (267925527).

601551081 is a wasteful number, since it uses less digits than its factorization.

601551081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43812 (or 43809 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 601551081 is about 24526.5383003799. The cubic root of 601551081 is about 844.1588356790.

The spelling of 601551081 in words is "six hundred one million, five hundred fifty-one thousand, eighty-one".