31140201229 has 4 divisors (see below), whose sum is σ = 31141143484. Its totient is φ = 31139258976.

The previous prime is 31140201187. The next prime is 31140201271. The reversal of 31140201229 is 92210204113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92210204113 = 73 ⋅1263153481.

It is an interprime number because it is at equal distance from previous prime (31140201187) and next prime (31140201271).

It can be written as a sum of positive squares in 2 ways, for example, as 13953515625 + 17186685604 = 118125^2 + 131098^2 .

It is a cyclic number.

It is not a de Polignac number, because 31140201229 - 2⁹ = 31140200717 is a prime.

It is a super-2 number, since 2×31140201229² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140207229) 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, 419682 + ... + 488275.

It is an arithmetic number, because the mean of its divisors is an integer number (7785285871).

Almost surely, 2^31140201229 is an apocalyptic number.

It is an amenable number.

31140201229 is a deficient number, since it is larger than the sum of its proper divisors (942255).

31140201229 is an equidigital number, since it uses as much as digits as its factorization.

31140201229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942254.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 31140201229 in words is "thirty-one billion, one hundred forty million, two hundred one thousand, two hundred twenty-nine".