200554615421 has 4 divisors (see below), whose sum is σ = 200656266972. Its totient is φ = 200452963872.

The previous prime is 200554615409. The next prime is 200554615433. The reversal of 200554615421 is 124516455002.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (200554615409) and next prime (200554615433).

It can be written as a sum of positive squares in 2 ways, for example, as 108797724025 + 91756891396 = 329845^2 + 302914^2 .

It is a cyclic number.

It is not a de Polignac number, because 200554615421 - 2¹⁰ = 200554614397 is a prime.

It is a super-2 number, since 2×200554615421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200554615621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50822816 + ... + 50826761.

It is an arithmetic number, because the mean of its divisors is an integer number (50164066743).

Almost surely, 2^200554615421 is an apocalyptic number.

It is an amenable number.

200554615421 is a deficient number, since it is larger than the sum of its proper divisors (101651551).

200554615421 is a wasteful number, since it uses less digits than its factorization.

200554615421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101651550.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 200554615421 in words is "two hundred billion, five hundred fifty-four million, six hundred fifteen thousand, four hundred twenty-one".