472551639 has 24 divisors (see below), whose sum is σ = 749992320. Its totient is φ = 263746224.

The previous prime is 472551637. The next prime is 472551683. The reversal of 472551639 is 936155274.

It is not a de Polignac number, because 472551639 - 2¹ = 472551637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 472551639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472551637) 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, 31059 + ... + 43700.

It is an arithmetic number, because the mean of its divisors is an integer number (31249680).

Almost surely, 2^472551639 is an apocalyptic number.

472551639 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

472551639 is a deficient number, since it is larger than the sum of its proper divisors (277440681).

472551639 is a wasteful number, since it uses less digits than its factorization.

472551639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74819 (or 74812 counting only the distinct ones).

The product of its digits is 226800, while the sum is 42.

The square root of 472551639 is about 21738.2528966796. The cubic root of 472551639 is about 778.9024883396.

The spelling of 472551639 in words is "four hundred seventy-two million, five hundred fifty-one thousand, six hundred thirty-nine".