84140551 has 8 divisors (see below), whose sum is σ = 93924864. Its totient is φ = 74712120.

The previous prime is 84140447. The next prime is 84140557. The reversal of 84140551 is 15504148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84140551 - 2⁹ = 84140039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84140557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88471 + ... + 89416.

It is an arithmetic number, because the mean of its divisors is an integer number (11740608).

Almost surely, 2^84140551 is an apocalyptic number.

84140551 is a deficient number, since it is larger than the sum of its proper divisors (9784313).

84140551 is a wasteful number, since it uses less digits than its factorization.

84140551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177941.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 84140551 is about 9172.8158708218. The cubic root of 84140551 is about 438.1960420831.

Adding to 84140551 its reverse (15504148), we get a palindrome (99644699).

The spelling of 84140551 in words is "eighty-four million, one hundred forty thousand, five hundred fifty-one".