5551121151531 has 6 divisors (see below), whose sum is σ = 8018286107780. Its totient is φ = 3700747434348.

The previous prime is 5551121151509. The next prime is 5551121151557. The reversal of 5551121151531 is 1351511211555.

5551121151531 is a `hidden beast` number, since 5 + 5 + 5 + 1 + 1 + 2 + 115 + 1 + 531 = 666.

It is not a de Polignac number, because 5551121151531 - 2¹⁰ = 5551121150507 is a prime.

It is a super-2 number, since 2×5551121151531² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5551121151931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308395619521 + ... + 308395619538.

Almost surely, 2^{5551121151531} is an apocalyptic number.

5551121151531 is a deficient number, since it is larger than the sum of its proper divisors (2467164956249).

5551121151531 is a wasteful number, since it uses less digits than its factorization.

5551121151531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616791239065 (or 616791239062 counting only the distinct ones).

The product of its digits is 18750, while the sum is 36.

The spelling of 5551121151531 in words is "five trillion, five hundred fifty-one billion, one hundred twenty-one million, one hundred fifty-one thousand, five hundred thirty-one".