1551203323551 has 48 divisors (see below), whose sum is σ = 2615805923328. Its totient is φ = 867341260800.

The previous prime is 1551203323529. The next prime is 1551203323601. The reversal of 1551203323551 is 1553233021551.

1551203323551 is a `hidden beast` number, since 1 + 5 + 51 + 2 + 0 + 33 + 23 + 551 = 666.

It is not a de Polignac number, because 1551203323551 - 2⁵ = 1551203323519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551203313551) 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 47 ways as a sum of consecutive naturals, for example, 13209786 + ... + 13326696.

It is an arithmetic number, because the mean of its divisors is an integer number (54495956736).

Almost surely, 2^{1551203323551} is an apocalyptic number.

1551203323551 is a deficient number, since it is larger than the sum of its proper divisors (1064602599777).

1551203323551 is a wasteful number, since it uses less digits than its factorization.

1551203323551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121452 (or 121449 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The spelling of 1551203323551 in words is "one trillion, five hundred fifty-one billion, two hundred three million, three hundred twenty-three thousand, five hundred fifty-one".