31143020330 has 8 divisors (see below), whose sum is σ = 56057436612. Its totient is φ = 12457208128.

The previous prime is 31143020299. The next prime is 31143020351. The reversal of 31143020330 is 3302034113.

It can be written as a sum of positive squares in 2 ways, for example, as 29922426361 + 1220593969 = 172981^2 + 34937^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1557151007 + ... + 1557151026.

Almost surely, 2^31143020330 is an apocalyptic number.

31143020330 is a deficient number, since it is larger than the sum of its proper divisors (24914416282).

31143020330 is a wasteful number, since it uses less digits than its factorization.

31143020330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114302040.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31143020330 its reverse (3302034113), we get a palindrome (34445054443).

The spelling of 31143020330 in words is "thirty-one billion, one hundred forty-three million, twenty thousand, three hundred thirty".