601720551 has 24 divisors (see below), whose sum is σ = 892041696. Its totient is φ = 390620160.

The previous prime is 601720523. The next prime is 601720589. The reversal of 601720551 is 155027106.

601720551 is a `hidden beast` number, since 601 + 7 + 2 + 0 + 5 + 51 = 666.

It is not a de Polignac number, because 601720551 - 2⁹ = 601720039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601720591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247126 + ... + 249548.

It is an arithmetic number, because the mean of its divisors is an integer number (37168404).

Almost surely, 2^601720551 is an apocalyptic number.

601720551 is a deficient number, since it is larger than the sum of its proper divisors (290321145).

601720551 is a wasteful number, since it uses less digits than its factorization.

601720551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143 (or 3140 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 601720551 is about 24529.9928862607. The cubic root of 601720551 is about 844.2381008599.

Adding to 601720551 its reverse (155027106), we get a palindrome (756747657).

The spelling of 601720551 in words is "six hundred one million, seven hundred twenty thousand, five hundred fifty-one".