3101220 has 48 divisors (see below), whose sum is σ = 9649920. Its totient is φ = 826848.

The previous prime is 3101207. The next prime is 3101233. The reversal of 3101220 is 221013.

3101220 = T₁₀₉ + T₁₁₀ + ... + T₂₇₀.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3101207) and next prime (3101233).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2332 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (201040).

Almost surely, 2^3101220 is an apocalyptic number.

3101220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3101220 is an abundant number, since it is smaller than the sum of its proper divisors (6548700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3101220 is a wasteful number, since it uses less digits than its factorization.

3101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761 (or 5753 counting only the distinct ones).

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

The square root of 3101220 is about 1761.0281088046. The cubic root of 3101220 is about 145.8290988340.

Adding to 3101220 its reverse (221013), we get a palindrome (3322233).

It can be divided in two parts, 3101 and 220, that added together give a triangular number (3321 = T₈₁).

The spelling of 3101220 in words is "three million, one hundred one thousand, two hundred twenty".