501040551 has 12 divisors (see below), whose sum is σ = 734307896. Its totient is φ = 303660720.

The previous prime is 501040549. The next prime is 501040571. The reversal of 501040551 is 155040105.

It is not a de Polignac number, because 501040551 - 2¹ = 501040549 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 (501040571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689776 + ... + 690501.

Almost surely, 2^501040551 is an apocalyptic number.

501040551 is a deficient number, since it is larger than the sum of its proper divisors (233267345).

501040551 is a wasteful number, since it uses less digits than its factorization.

501040551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380302 (or 1380291 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 501040551 is about 22383.9351098059. The cubic root of 501040551 is about 794.2507350640.

Adding to 501040551 its reverse (155040105), we get a palindrome (656080656).

The spelling of 501040551 in words is "five hundred one million, forty thousand, five hundred fifty-one".