2215551100 has 36 divisors (see below), whose sum is σ = 5494568464. Its totient is φ = 759617280.

The previous prime is 2215551073. The next prime is 2215551119. The reversal of 2215551100 is 11555122.

It is a happy number.

It is a super-2 number, since 2×2215551100² = 9817333353422420000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1581837 + ... + 1583236.

Almost surely, 2^2215551100 is an apocalyptic number.

2215551100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215551100 is an abundant number, since it is smaller than the sum of its proper divisors (3279017364).

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

2215551100 is a wasteful number, since it uses less digits than its factorization.

2215551100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165094 (or 3165087 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 2215551100 is about 47069.6409589026. The cubic root of 2215551100 is about 1303.6487434793.

The spelling of 2215551100 in words is "two billion, two hundred fifteen million, five hundred fifty-one thousand, one hundred".