2131554504451 has 4 divisors (see below), whose sum is σ = 2131772754672. Its totient is φ = 2131336254232.

The previous prime is 2131554504403. The next prime is 2131554504463. The reversal of 2131554504451 is 1544054551312.

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 2131554504451 - 2⁷ = 2131554504323 is a prime.

It is a super-2 number, since 2×2131554504451² (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 (2131554504251) 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, 109110460 + ... + 109129993.

It is an arithmetic number, because the mean of its divisors is an integer number (532943188668).

Almost surely, 2^{2131554504451} is an apocalyptic number.

2131554504451 is a deficient number, since it is larger than the sum of its proper divisors (218250221).

2131554504451 is an equidigital number, since it uses as much as digits as its factorization.

2131554504451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218250220.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 2131554504451 in words is "two trillion, one hundred thirty-one billion, five hundred fifty-four million, five hundred four thousand, four hundred fifty-one".