Search a number
BaseRepresentation
bin10011110110111010…
…000111111001100111
32001000222200010021000
4103312322013321213
5322132002113111
613443442524343
71353246365643
oct236672077147
961028603230
1021322301031
119051979399
1241709666b3
13201a620495
141063b6dc23
1584bdb3c56
hex4f6e87e67

21322301031 has 8 divisors (see below), whose sum is σ = 31588594160. Its totient is φ = 14214867336.

The previous prime is 21322301009. The next prime is 21322301057. The reversal of 21322301031 is 13010322312.

Adding to 21322301031 its reverse (13010322312), we get a palindrome (34332623343).

It is not a de Polignac number, because 21322301031 - 25 = 21322300999 is a prime.

It is a super-2 number, since 2×213223010312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21322300995 and 21322301013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322301531) 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, 394857400 + ... + 394857453.

It is an arithmetic number, because the mean of its divisors is an integer number (3948574270).

Almost surely, 221322301031 is an apocalyptic number.

21322301031 is a deficient number, since it is larger than the sum of its proper divisors (10266293129).

21322301031 is an equidigital number, since it uses as much as digits as its factorization.

21322301031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789714862 (or 789714856 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The spelling of 21322301031 in words is "twenty-one billion, three hundred twenty-two million, three hundred one thousand, thirty-one".