1203503454551 has 4 divisors (see below), whose sum is σ = 1220454207504. Its totient is φ = 1186552701600.

The previous prime is 1203503454523. The next prime is 1203503454553. The reversal of 1203503454551 is 1554543053021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203503454551 is a prime.

It is a super-2 number, since 2×1203503454551² (a number of 25 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 (1203503454553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8475376370 + ... + 8475376511.

It is an arithmetic number, because the mean of its divisors is an integer number (305113551876).

Almost surely, 2^{1203503454551} is an apocalyptic number.

1203503454551 is a deficient number, since it is larger than the sum of its proper divisors (16950752953).

1203503454551 is an equidigital number, since it uses as much as digits as its factorization.

1203503454551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16950752952.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 1203503454551 in words is "one trillion, two hundred three billion, five hundred three million, four hundred fifty-four thousand, five hundred fifty-one".