203404342451 has 2 divisors, whose sum is σ = 203404342452. Its totient is φ = 203404342450.

The previous prime is 203404342439. The next prime is 203404342483. The reversal of 203404342451 is 154243404302.

It is an a-pointer prime, because the next prime (203404342483) can be obtained adding 203404342451 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203404342451 - 2²⁶ = 203337233587 is a prime.

It is not a weakly prime, because it can be changed into another prime (203404342051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101702171225 + 101702171226.

It is an arithmetic number, because the mean of its divisors is an integer number (101702171226).

Almost surely, 2^203404342451 is an apocalyptic number.

203404342451 is a deficient number, since it is larger than the sum of its proper divisors (1).

203404342451 is an equidigital number, since it uses as much as digits as its factorization.

203404342451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 203404342451 its reverse (154243404302), we get a palindrome (357647746753).

The spelling of 203404342451 in words is "two hundred three billion, four hundred four million, three hundred forty-two thousand, four hundred fifty-one".