2051097390 has 96 divisors (see below), whose sum is σ = 5648348160. Its totient is φ = 535292064.

The previous prime is 2051097337. The next prime is 2051097407. The reversal of 2051097390 is 937901502.

2051097390 is a `hidden beast` number, since 20 + 510 + 97 + 39 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105231 + ... + 123189.

It is an arithmetic number, because the mean of its divisors is an integer number (58836960).

Almost surely, 2^2051097390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051097390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2824174080).

2051097390 is an abundant number, since it is smaller than the sum of its proper divisors (3597250770).

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

2051097390 is a wasteful number, since it uses less digits than its factorization.

2051097390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18028 (or 18016 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 2051097390 is about 45289.0427145463. The cubic root of 2051097390 is about 1270.5607274478.

Adding to 2051097390 its reverse (937901502), we get a palindrome (2988998892).

The spelling of 2051097390 in words is "two billion, fifty-one million, ninety-seven thousand, three hundred ninety".