203400554540551 has 2 divisors, whose sum is σ = 203400554540552. Its totient is φ = 203400554540550.

The previous prime is 203400554540501. The next prime is 203400554540563. The reversal of 203400554540551 is 155045455004302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203400554540551 - 2²⁵ = 203400520986119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203400554540498 and 203400554540507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203400554540501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101700277270275 + 101700277270276.

It is an arithmetic number, because the mean of its divisors is an integer number (101700277270276).

Almost surely, 2^{203400554540551} is an apocalyptic number.

203400554540551 is a deficient number, since it is larger than the sum of its proper divisors (1).

203400554540551 is an equidigital number, since it uses as much as digits as its factorization.

203400554540551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200000, while the sum is 43.

The spelling of 203400554540551 in words is "two hundred three trillion, four hundred billion, five hundred fifty-four million, five hundred forty thousand, five hundred fifty-one".