31143341021 has 8 divisors (see below), whose sum is σ = 33540834264. Its totient is φ = 28746112320.

The previous prime is 31143340981. The next prime is 31143341027. The reversal of 31143341021 is 12014334113.

It can be written as a sum of positive squares in 4 ways, for example, as 1331520100 + 29811820921 = 36490^2 + 172661^2 .

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 31143341021 - 2¹⁴ = 31143324637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143341027) 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, 226295 + ... + 336891.

It is an arithmetic number, because the mean of its divisors is an integer number (4192604283).

Almost surely, 2^31143341021 is an apocalyptic number.

It is an amenable number.

31143341021 is a deficient number, since it is larger than the sum of its proper divisors (2397493243).

31143341021 is a wasteful number, since it uses less digits than its factorization.

31143341021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132271.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31143341021 its reverse (12014334113), we get a palindrome (43157675134).

The spelling of 31143341021 in words is "thirty-one billion, one hundred forty-three million, three hundred forty-one thousand, twenty-one".