1000220031 has 12 divisors (see below), whose sum is σ = 1445377752. Its totient is φ = 666529296.

The previous prime is 1000220029. The next prime is 1000220077. The reversal of 1000220031 is 1300220001.

It is a happy number.

It is not a de Polignac number, because 1000220031 - 2¹ = 1000220029 is a prime.

It is a super-2 number, since 2×1000220031² = 2000880220827281922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1000219995 and 1000220022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000220731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141 + ... + 44726.

It is an arithmetic number, because the mean of its divisors is an integer number (120448146).

Almost surely, 2^1000220031 is an apocalyptic number.

1000220031 is a deficient number, since it is larger than the sum of its proper divisors (445157721).

1000220031 is a wasteful number, since it uses less digits than its factorization.

1000220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47350 (or 47347 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1000220031 is about 31626.2554059123. The cubic root of 1000220031 is about 1000.0733382880.

Adding to 1000220031 its reverse (1300220001), we get a palindrome (2300440032).

The spelling of 1000220031 in words is "one billion, two hundred twenty thousand, thirty-one".