2061551400 has 96 divisors (see below), whose sum is σ = 6454274400. Its totient is φ = 544288000.

The previous prime is 2061551399. The next prime is 2061551407. The reversal of 2061551400 is 41551602.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2061551407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43591 + ... + 77609.

It is an arithmetic number, because the mean of its divisors is an integer number (67232025).

Almost surely, 2^2061551400 is an apocalyptic number.

2061551400 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 2061551400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3227137200).

2061551400 is an abundant number, since it is smaller than the sum of its proper divisors (4392723000).

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

2061551400 is a wasteful number, since it uses less digits than its factorization.

2061551400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34139 (or 34130 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2061551400 is about 45404.3103680697. The cubic root of 2061551400 is about 1272.7156636851.

The spelling of 2061551400 in words is "two billion, sixty-one million, five hundred fifty-one thousand, four hundred".