1551025521403 has 2 divisors, whose sum is σ = 1551025521404. Its totient is φ = 1551025521402.

The previous prime is 1551025521371. The next prime is 1551025521469. The reversal of 1551025521403 is 3041255201551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1551025521403 - 2⁵ = 1551025521371 is a prime.

It is a super-2 number, since 2×1551025521403² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1551025521503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775512760701 + 775512760702.

It is an arithmetic number, because the mean of its divisors is an integer number (775512760702).

Almost surely, 2^{1551025521403} is an apocalyptic number.

1551025521403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551025521403 is an equidigital number, since it uses as much as digits as its factorization.

1551025521403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 1551025521403 in words is "one trillion, five hundred fifty-one billion, twenty-five million, five hundred twenty-one thousand, four hundred three".