505851871 has 16 divisors (see below), whose sum is σ = 595584000. Its totient is φ = 420624288.

The previous prime is 505851823. The next prime is 505851889. The reversal of 505851871 is 178158505.

It is not a de Polignac number, because 505851871 - 2¹¹ = 505849823 is a prime.

It is a super-2 number, since 2×505851871² = 511772230788401282, 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 (505851571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39210 + ... + 50488.

It is an arithmetic number, because the mean of its divisors is an integer number (37224000).

Almost surely, 2^505851871 is an apocalyptic number.

505851871 is a deficient number, since it is larger than the sum of its proper divisors (89732129).

505851871 is a wasteful number, since it uses less digits than its factorization.

505851871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11478.

The product of its (nonzero) digits is 56000, while the sum is 40.

The square root of 505851871 is about 22491.1509487620. The cubic root of 505851871 is about 796.7849460731.

The spelling of 505851871 in words is "five hundred five million, eight hundred fifty-one thousand, eight hundred seventy-one".