501056551 has 4 divisors (see below), whose sum is σ = 504248152. Its totient is φ = 497864952.

The previous prime is 501056533. The next prime is 501056573. The reversal of 501056551 is 155650105.

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 501056551 - 2¹¹ = 501054503 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 (501056251) 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, 1595565 + ... + 1595878.

It is an arithmetic number, because the mean of its divisors is an integer number (126062038).

Almost surely, 2^501056551 is an apocalyptic number.

501056551 is a deficient number, since it is larger than the sum of its proper divisors (3191601).

501056551 is a wasteful number, since it uses less digits than its factorization.

501056551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191600.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 501056551 is about 22384.2925061303. The cubic root of 501056551 is about 794.2591893874.

The spelling of 501056551 in words is "five hundred one million, fifty-six thousand, five hundred fifty-one".