84440051 has 4 divisors (see below), whose sum is σ = 84588504. Its totient is φ = 84291600.

The previous prime is 84440029. The next prime is 84440093. The reversal of 84440051 is 15004448.

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 84440051 - 2¹⁴ = 84423667 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 84440051.

It is not an unprimeable number, because it can be changed into a prime (84442051) 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, 73370 + ... + 74511.

It is an arithmetic number, because the mean of its divisors is an integer number (21147126).

Almost surely, 2^84440051 is an apocalyptic number.

84440051 is a deficient number, since it is larger than the sum of its proper divisors (148453).

84440051 is a wasteful number, since it uses less digits than its factorization.

84440051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148452.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 84440051 is about 9189.1267811474. The cubic root of 84440051 is about 438.7153489787.

Adding to 84440051 its reverse (15004448), we get a palindrome (99444499).

The spelling of 84440051 in words is "eighty-four million, four hundred forty thousand, fifty-one".