31555032434 has 4 divisors (see below), whose sum is σ = 47332548654. Its totient is φ = 15777516216.

The previous prime is 31555032403. The next prime is 31555032437. The reversal of 31555032434 is 43423055513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43423055513 = 607 ⋅71537159.

It can be written as a sum of positive squares in only one way, i.e., 23394620209 + 8160412225 = 152953^2 + 90335^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31555032394 and 31555032403.

It is not an unprimeable number, because it can be changed into a prime (31555032437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7888758107 + ... + 7888758110.

Almost surely, 2^31555032434 is an apocalyptic number.

31555032434 is a deficient number, since it is larger than the sum of its proper divisors (15777516220).

31555032434 is a wasteful number, since it uses less digits than its factorization.

31555032434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15777516219.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 31555032434 its reverse (43423055513), we get a palindrome (74978087947).

The spelling of 31555032434 in words is "thirty-one billion, five hundred fifty-five million, thirty-two thousand, four hundred thirty-four".