31330220009 has 4 divisors (see below), whose sum is σ = 34178421840. Its totient is φ = 28482018180.

The previous prime is 31330219939. The next prime is 31330220027. The reversal of 31330220009 is 90002203313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90002203313 = 11 ⋅8182018483.

It is not a de Polignac number, because 31330220009 - 2¹⁶ = 31330154473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31330220809) 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, 1424100899 + ... + 1424100920.

It is an arithmetic number, because the mean of its divisors is an integer number (8544605460).

Almost surely, 2^31330220009 is an apocalyptic number.

It is an amenable number.

31330220009 is a deficient number, since it is larger than the sum of its proper divisors (2848201831).

31330220009 is a wasteful number, since it uses less digits than its factorization.

31330220009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848201830.

The product of its (nonzero) digits is 972, while the sum is 23.

The spelling of 31330220009 in words is "thirty-one billion, three hundred thirty million, two hundred twenty thousand, nine".