2731631223545 has 32 divisors (see below), whose sum is σ = 3817765550592. Its totient is φ = 1837369976832.

The previous prime is 2731631223527. The next prime is 2731631223611. The reversal of 2731631223545 is 5453221361372.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2731631223545 - 2²⁰ = 2731630174969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2731631223496 and 2731631223505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8340809 + ... + 8662121.

It is an arithmetic number, because the mean of its divisors is an integer number (119305173456).

Almost surely, 2^{2731631223545} is an apocalyptic number.

It is an amenable number.

2731631223545 is a deficient number, since it is larger than the sum of its proper divisors (1086134327047).

2731631223545 is a wasteful number, since it uses less digits than its factorization.

2731631223545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325961.

The product of its digits is 907200, while the sum is 44.

The spelling of 2731631223545 in words is "two trillion, seven hundred thirty-one billion, six hundred thirty-one million, two hundred twenty-three thousand, five hundred forty-five".