31356450443146 has 4 divisors (see below), whose sum is σ = 47034675664722. Its totient is φ = 15678225221572.

The previous prime is 31356450443093. The next prime is 31356450443251. The reversal of 31356450443146 is 64134405465313.

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

It can be written as a sum of positive squares in only one way, i.e., 26861011583121 + 4495438860025 = 5182761^2 + 2120245^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31356450443146.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7839112610785 + ... + 7839112610788.

Almost surely, 2^{31356450443146} is an apocalyptic number.

31356450443146 is a deficient number, since it is larger than the sum of its proper divisors (15678225221576).

31356450443146 is a wasteful number, since it uses less digits than its factorization.

31356450443146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15678225221575.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 31356450443146 in words is "thirty-one trillion, three hundred fifty-six billion, four hundred fifty million, four hundred forty-three thousand, one hundred forty-six".