2061550900 has 36 divisors (see below), whose sum is σ = 4736720268. Its totient is φ = 776112640.

The previous prime is 2061550859. The next prime is 2061550903. The reversal of 2061550900 is 90551602.

It can be written as a sum of positive squares in 6 ways, for example, as 22486564 + 2039064336 = 4742^2 + 45156^2 .

It is a super-2 number, since 2×2061550900² = 8499984226581620000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061550903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 604639 + ... + 608038.

It is an arithmetic number, because the mean of its divisors is an integer number (131575563).

Almost surely, 2^2061550900 is an apocalyptic number.

2061550900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2061550900 is an abundant number, since it is smaller than the sum of its proper divisors (2675169368).

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

2061550900 is a wasteful number, since it uses less digits than its factorization.

2061550900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212708 (or 1212701 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2061550900 is about 45404.3048619842. The cubic root of 2061550900 is about 1272.7155607920.

The spelling of 2061550900 in words is "two billion, sixty-one million, five hundred fifty thousand, nine hundred".