77220543 has 8 divisors (see below), whose sum is σ = 103290928. Its totient is φ = 51315264.

The previous prime is 77220527. The next prime is 77220547. The reversal of 77220543 is 34502277.

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

It is not a de Polignac number, because 77220543 - 2⁴ = 77220527 is a prime.

It is a super-2 number, since 2×77220543² = 11926024522429698, which contains 22 as substring.

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 77220543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77220547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40180 + ... + 42057.

It is an arithmetic number, because the mean of its divisors is an integer number (12911366).

Almost surely, 2^77220543 is an apocalyptic number.

77220543 is a deficient number, since it is larger than the sum of its proper divisors (26070385).

77220543 is a wasteful number, since it uses less digits than its factorization.

77220543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82553.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 77220543 is about 8787.5220056623. The cubic root of 77220543 is about 425.8378727981.

The spelling of 77220543 in words is "seventy-seven million, two hundred twenty thousand, five hundred forty-three".