Search a number
-
+
1438131531 = 33531358009
BaseRepresentation
bin101010110111000…
…0010010101001011
310201020002122120210
41111232002111023
510421130202111
6354412052203
750431626204
oct12556022513
93636078523
101438131531
11678873561
12341764063
1319bc3ca05
14d8dda5ab
15863c80a6
hex55b8254b

1438131531 has 8 divisors (see below), whose sum is σ = 1922942160. Its totient is φ = 956037632.

The previous prime is 1438131529. The next prime is 1438131551. The reversal of 1438131531 is 1351318341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1438131531 - 21 = 1438131529 is a prime.

It is a super-2 number, since 2×14381315312 = 4136444600912807922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438131551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677946 + ... + 680063.

It is an arithmetic number, because the mean of its divisors is an integer number (240367770).

Almost surely, 21438131531 is an apocalyptic number.

1438131531 is a deficient number, since it is larger than the sum of its proper divisors (484810629).

1438131531 is a wasteful number, since it uses less digits than its factorization.

1438131531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358365.

The product of its digits is 4320, while the sum is 30.

The square root of 1438131531 is about 37922.7046899348. The cubic root of 1438131531 is about 1128.7546075217.

Adding to 1438131531 its reverse (1351318341), we get a palindrome (2789449872).

The spelling of 1438131531 in words is "one billion, four hundred thirty-eight million, one hundred thirty-one thousand, five hundred thirty-one".

Divisors: 1 3 353 1059 1358009 4074027 479377177 1438131531