320220161451 has 12 divisors (see below), whose sum is σ = 462664386912. Its totient is φ = 213422805936.

The previous prime is 320220161447. The next prime is 320220161461. The reversal of 320220161451 is 154161022023.

320220161451 is a `hidden beast` number, since 3 + 2 + 0 + 2 + 201 + 6 + 1 + 451 = 666.

It is not a de Polignac number, because 320220161451 - 2² = 320220161447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320220161461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4739736 + ... + 4806821.

It is an arithmetic number, because the mean of its divisors is an integer number (38555365576).

Almost surely, 2^320220161451 is an apocalyptic number.

320220161451 is a deficient number, since it is larger than the sum of its proper divisors (142444225461).

320220161451 is a wasteful number, since it uses less digits than its factorization.

320220161451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550290 (or 9550287 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 320220161451 its reverse (154161022023), we get a palindrome (474381183474).

It can be divided in two parts, 320220 and 161451, that added together give a triangular number (481671 = T₉₈₁).

The spelling of 320220161451 in words is "three hundred twenty billion, two hundred twenty million, one hundred sixty-one thousand, four hundred fifty-one".