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31242013201 = 74463144743
BaseRepresentation
bin11101000110001010…
…110100101000010001
32222122022100201012001
4131012022310220101
51002440423410301
622204040434001
72154130505410
oct350612645021
988568321161
1031242013201
1112282335a23
12607aa78901
132c3b7a9559
141725393477
15c2cbb2c01
hex7462b4a11

31242013201 has 4 divisors (see below), whose sum is σ = 35705157952. Its totient is φ = 26778868452.

The previous prime is 31242013199. The next prime is 31242013207. The reversal of 31242013201 is 10231024213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31242013201 - 21 = 31242013199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31242013207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231572365 + ... + 2231572378.

It is an arithmetic number, because the mean of its divisors is an integer number (8926289488).

Almost surely, 231242013201 is an apocalyptic number.

It is an amenable number.

31242013201 is a deficient number, since it is larger than the sum of its proper divisors (4463144751).

31242013201 is an equidigital number, since it uses as much as digits as its factorization.

31242013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463144750.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31242013201 its reverse (10231024213), we get a palindrome (41473037414).

The spelling of 31242013201 in words is "thirty-one billion, two hundred forty-two million, thirteen thousand, two hundred one".

Divisors: 1 7 4463144743 31242013201