83642051 has 4 divisors (see below), whose sum is σ = 83909592. Its totient is φ = 83374512.

The previous prime is 83642029. The next prime is 83642081. The reversal of 83642051 is 15024638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15024638 = 2 ⋅7512319.

It is a cyclic number.

It is not a de Polignac number, because 83642051 - 2¹⁰ = 83641027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83642081) 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, 133301 + ... + 133926.

It is an arithmetic number, because the mean of its divisors is an integer number (20977398).

Almost surely, 2^83642051 is an apocalyptic number.

83642051 is a deficient number, since it is larger than the sum of its proper divisors (267541).

83642051 is a wasteful number, since it uses less digits than its factorization.

83642051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267540.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 83642051 is about 9145.6028232151. The cubic root of 83642051 is about 437.3289471172.

Adding to 83642051 its reverse (15024638), we get a palindrome (98666689).

The spelling of 83642051 in words is "eighty-three million, six hundred forty-two thousand, fifty-one".