1551215043425 has 12 divisors (see below), whose sum is σ = 1923574250556. Its totient is φ = 1240928424000.

The previous prime is 1551215043421. The next prime is 1551215043463. The reversal of 1551215043425 is 5243405121551.

It can be written as a sum of positive squares in 6 ways, for example, as 109899543121 + 1441315500304 = 331511^2 + 1200548^2 .

It is not a de Polignac number, because 1551215043425 - 2² = 1551215043421 is a prime.

It is a super-2 number, since 2×1551215043425² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551215043421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354926 + ... + 1796775.

It is an arithmetic number, because the mean of its divisors is an integer number (160297854213).

Almost surely, 2^{1551215043425} is an apocalyptic number.

It is an amenable number.

1551215043425 is a deficient number, since it is larger than the sum of its proper divisors (372359207131).

1551215043425 is a wasteful number, since it uses less digits than its factorization.

1551215043425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180548 (or 2180543 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 1551215043425 in words is "one trillion, five hundred fifty-one billion, two hundred fifteen million, forty-three thousand, four hundred twenty-five".