442725221377 has 4 divisors (see below), whose sum is σ = 468767881476. Its totient is φ = 416682561280.

The previous prime is 442725221363. The next prime is 442725221399. The reversal of 442725221377 is 773122527244.

It is a happy number.

It is a Cunningham number, because it is equal to 665376²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 344681713216 + 98043508161 = 587096^2 + 313119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442725221377 is a prime.

It is a super-2 number, since 2×442725221377² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442725221077) 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, 13021330024 + ... + 13021330057.

It is an arithmetic number, because the mean of its divisors is an integer number (117191970369).

Almost surely, 2^442725221377 is an apocalyptic number.

It is an amenable number.

442725221377 is a deficient number, since it is larger than the sum of its proper divisors (26042660099).

442725221377 is a wasteful number, since it uses less digits than its factorization.

442725221377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26042660098.

The product of its digits is 1317120, while the sum is 46.

The spelling of 442725221377 in words is "four hundred forty-two billion, seven hundred twenty-five million, two hundred twenty-one thousand, three hundred seventy-seven".