231555627473 has 4 divisors (see below), whose sum is σ = 235351621428. Its totient is φ = 227759633520.

The previous prime is 231555627469. The next prime is 231555627493. The reversal of 231555627473 is 374726555132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 109285119889 + 122270507584 = 330583^2 + 349672^2 .

It is a cyclic number.

It is not a de Polignac number, because 231555627473 - 2² = 231555627469 is a prime.

It is a super-2 number, since 2×231555627473² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231555627463) 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, 1897996886 + ... + 1897997007.

It is an arithmetic number, because the mean of its divisors is an integer number (58837905357).

Almost surely, 2^231555627473 is an apocalyptic number.

It is an amenable number.

231555627473 is a deficient number, since it is larger than the sum of its proper divisors (3795993955).

231555627473 is an equidigital number, since it uses as much as digits as its factorization.

231555627473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795993954.

The product of its digits is 5292000, while the sum is 50.

The spelling of 231555627473 in words is "two hundred thirty-one billion, five hundred fifty-five million, six hundred twenty-seven thousand, four hundred seventy-three".