2051573400 has 192 divisors, whose sum is σ = 7167398400. Its totient is φ = 539280000.

The previous prime is 2051573399. The next prime is 2051573437. The reversal of 2051573400 is 43751502.

It is a happy number.

2051573400 is a `hidden beast` number, since 2 + 0 + 51 + 573 + 40 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 380725 + ... + 386075.

It is an arithmetic number, because the mean of its divisors is an integer number (37330200).

Almost surely, 2^2051573400 is an apocalyptic number.

2051573400 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 2051573400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3583699200).

2051573400 is an abundant number, since it is smaller than the sum of its proper divisors (5115825000).

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

2051573400 is a wasteful number, since it uses less digits than its factorization.

2051573400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447 (or 5432 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 2051573400 is about 45294.2976543406. The cubic root of 2051573400 is about 1270.6590086304.

The spelling of 2051573400 in words is "two billion, fifty-one million, five hundred seventy-three thousand, four hundred".