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31446052809 = 3192272430331
BaseRepresentation
bin11101010010010101…
…001010111111001001
310000011112021222220120
4131102111022333021
51003400142142214
622240210013453
72162156016153
oct352225127711
9100145258816
1031446052809
11123775279a6
126117277289
132c71b49452
141744507ad3
15c40a68ea9
hex75254afc9

31446052809 has 16 divisors (see below), whose sum is σ = 44329255680. Its totient is φ = 19773164880.

The previous prime is 31446052793. The next prime is 31446052817. The reversal of 31446052809 is 90825064413.

It is not a de Polignac number, because 31446052809 - 24 = 31446052793 is a prime.

It is a super-3 number, since 3×314460528093 (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31446052819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1202227 + ... + 1228104.

It is an arithmetic number, because the mean of its divisors is an integer number (2770578480).

Almost surely, 231446052809 is an apocalyptic number.

It is an amenable number.

31446052809 is a deficient number, since it is larger than the sum of its proper divisors (12883202871).

31446052809 is a wasteful number, since it uses less digits than its factorization.

31446052809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430580.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 31446052809 in words is "thirty-one billion, four hundred forty-six million, fifty-two thousand, eight hundred nine".

Divisors: 1 3 19 57 227 681 4313 12939 2430331 7290993 46176289 138528867 551685137 1655055411 10482017603 31446052809