442121155 has 16 divisors (see below), whose sum is σ = 607023360. Its totient is φ = 302825952.

The previous prime is 442121143. The next prime is 442121191. The reversal of 442121155 is 551121244.

It is a cyclic number.

It is not a de Polignac number, because 442121155 - 2²¹ = 440024003 is a prime.

It is a super-2 number, since 2×442121155² = 390942231397068050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26476 + ... + 39814.

It is an arithmetic number, because the mean of its divisors is an integer number (37938960).

Almost surely, 2^442121155 is an apocalyptic number.

442121155 is a deficient number, since it is larger than the sum of its proper divisors (164902205).

442121155 is a wasteful number, since it uses less digits than its factorization.

442121155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14298.

The product of its digits is 1600, while the sum is 25.

The square root of 442121155 is about 21026.6772220434. The cubic root of 442121155 is about 761.8107533103.

Adding to 442121155 its reverse (551121244), we get a palindrome (993242399).

The spelling of 442121155 in words is "four hundred forty-two million, one hundred twenty-one thousand, one hundred fifty-five".