31216149451 has 8 divisors (see below), whose sum is σ = 31398069680. Its totient is φ = 31034437632.

The previous prime is 31216149449. The next prime is 31216149457. The reversal of 31216149451 is 15494161213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31216149451 - 2¹ = 31216149449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31216149451.

It is not an unprimeable number, because it can be changed into a prime (31216149457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253531 + ... + 355963.

It is an arithmetic number, because the mean of its divisors is an integer number (3924758710).

Almost surely, 2^31216149451 is an apocalyptic number.

31216149451 is a deficient number, since it is larger than the sum of its proper divisors (181920229).

31216149451 is a wasteful number, since it uses less digits than its factorization.

31216149451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104205.

The product of its digits is 25920, while the sum is 37.

The spelling of 31216149451 in words is "thirty-one billion, two hundred sixteen million, one hundred forty-nine thousand, four hundred fifty-one".