2105257490 has 16 divisors (see below), whose sum is σ = 4330815552. Its totient is φ = 721802544.

The previous prime is 2105257471. The next prime is 2105257499. The reversal of 2105257490 is 947525012.

It is a super-2 number, since 2×2105257490² = 8864218198402200200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 2105257490.

It is not an unprimeable number, because it can be changed into a prime (2105257499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15037484 + ... + 15037623.

It is an arithmetic number, because the mean of its divisors is an integer number (270675972).

Almost surely, 2^2105257490 is an apocalyptic number.

2105257490 is an abundant number, since it is smaller than the sum of its proper divisors (2225558062).

2105257490 is a wasteful number, since it uses less digits than its factorization.

2105257490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30075121.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 2105257490 is about 45883.0850096198. The cubic root of 2105257490 is about 1281.6469461660.

The spelling of 2105257490 in words is "two billion, one hundred five million, two hundred fifty-seven thousand, four hundred ninety".