86216542 has 4 divisors (see below), whose sum is σ = 129324816. Its totient is φ = 43108270.

The previous prime is 86216539. The next prime is 86216567. The reversal of 86216542 is 24561268.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×86216542² = 14866584228875528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86216498 and 86216507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21554134 + ... + 21554137.

It is an arithmetic number, because the mean of its divisors is an integer number (32331204).

Almost surely, 2^86216542 is an apocalyptic number.

86216542 is a deficient number, since it is larger than the sum of its proper divisors (43108274).

86216542 is a wasteful number, since it uses less digits than its factorization.

86216542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43108273.

The product of its digits is 23040, while the sum is 34.

The square root of 86216542 is about 9285.2863176102. The cubic root of 86216542 is about 441.7706576224.

The spelling of 86216542 in words is "eighty-six million, two hundred sixteen thousand, five hundred forty-two".