31284649451 has 4 divisors (see below), whose sum is σ = 34128708504. Its totient is φ = 28440590400.

The previous prime is 31284649439. The next prime is 31284649457. The reversal of 31284649451 is 15494648213.

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

It is a cyclic number.

It is not a de Polignac number, because 31284649451 - 2⁶ = 31284649387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31284649396 and 31284649405.

It is not an unprimeable number, because it can be changed into a prime (31284649457) 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, 1422029510 + ... + 1422029531.

It is an arithmetic number, because the mean of its divisors is an integer number (8532177126).

Almost surely, 2^31284649451 is an apocalyptic number.

31284649451 is a deficient number, since it is larger than the sum of its proper divisors (2844059053).

31284649451 is a wasteful number, since it uses less digits than its factorization.

31284649451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844059052.

The product of its digits is 829440, while the sum is 47.

The spelling of 31284649451 in words is "thirty-one billion, two hundred eighty-four million, six hundred forty-nine thousand, four hundred fifty-one".