1031616436 has 12 divisors (see below), whose sum is σ = 1830059812. Its totient is φ = 508742208.

The previous prime is 1031616431. The next prime is 1031616461. The reversal of 1031616436 is 6346161301.

It can be written as a sum of positive squares in 2 ways, for example, as 355096336 + 676520100 = 18844^2 + 26010^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1031616398 and 1031616407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031616431) 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, 1766175 + ... + 1766758.

Almost surely, 2^1031616436 is an apocalyptic number.

It is an amenable number.

1031616436 is a deficient number, since it is larger than the sum of its proper divisors (798443376).

1031616436 is a wasteful number, since it uses less digits than its factorization.

1031616436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533010 (or 3533008 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1031616436 is about 32118.7863407072. The cubic root of 1031616436 is about 1010.4296561022.

Adding to 1031616436 its reverse (6346161301), we get a palindrome (7377777737).

The spelling of 1031616436 in words is "one billion, thirty-one million, six hundred sixteen thousand, four hundred thirty-six".