2131105210551 has 40 divisors (see below), whose sum is σ = 3270625671104. Its totient is φ = 1381880969280.

The previous prime is 2131105210519. The next prime is 2131105210571. The reversal of 2131105210551 is 1550125011312.

It is a happy number.

2131105210551 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 105 + 2 + 1 + 0 + 551 = 666.

It is not a de Polignac number, because 2131105210551 - 2⁵ = 2131105210519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131105210571) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9057666 + ... + 9289968.

Almost surely, 2^{2131105210551} is an apocalyptic number.

2131105210551 is a deficient number, since it is larger than the sum of its proper divisors (1139520460553).

2131105210551 is a wasteful number, since it uses less digits than its factorization.

2131105210551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235413 (or 235404 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 2131105210551 in words is "two trillion, one hundred thirty-one billion, one hundred five million, two hundred ten thousand, five hundred fifty-one".