2106155520 has 400 divisors, whose sum is σ = 8627179968. Its totient is φ = 481075200.

The previous prime is 2106155507. The next prime is 2106155533. The reversal of 2106155520 is 255516012.

2106155520 is a `hidden beast` number, since 2 + 106 + 1 + 5 + 552 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2106155507) and next prime (2106155533).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1450795 + ... + 1452245.

Almost surely, 2^2106155520 is an apocalyptic number.

2106155520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2106155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4313589984).

2106155520 is an abundant number, since it is smaller than the sum of its proper divisors (6521024448).

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

2106155520 is an equidigital number, since it uses as much as digits as its factorization.

2106155520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 2106155520 is about 45892.8700344618. The cubic root of 2106155520 is about 1281.8291556738.

The spelling of 2106155520 in words is "two billion, one hundred six million, one hundred fifty-five thousand, five hundred twenty".