1351125531551 has 4 divisors (see below), whose sum is σ = 1361764315392. Its totient is φ = 1340486747712.

The previous prime is 1351125531529. The next prime is 1351125531643. The reversal of 1351125531551 is 1551355211531.

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

It is a cyclic number.

It is not a de Polignac number, because 1351125531551 - 2³⁸ = 1076247624607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351125533551) 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, 5319391730 + ... + 5319391983.

It is an arithmetic number, because the mean of its divisors is an integer number (340441078848).

Almost surely, 2^{1351125531551} is an apocalyptic number.

1351125531551 is a deficient number, since it is larger than the sum of its proper divisors (10638783841).

1351125531551 is a wasteful number, since it uses less digits than its factorization.

1351125531551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10638783840.

The product of its digits is 56250, while the sum is 38.

The spelling of 1351125531551 in words is "one trillion, three hundred fifty-one billion, one hundred twenty-five million, five hundred thirty-one thousand, five hundred fifty-one".