85239554 has 4 divisors (see below), whose sum is σ = 127859334. Its totient is φ = 42619776.

The previous prime is 85239551. The next prime is 85239559. The reversal of 85239554 is 45593258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45593258 = 2 ⋅22796629.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 33327529 = 7205^2 + 5773^2 .

It is a super-2 number, since 2×85239554² = 14531563132237832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85239551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21309887 + ... + 21309890.

Almost surely, 2^85239554 is an apocalyptic number.

85239554 is a deficient number, since it is larger than the sum of its proper divisors (42619780).

85239554 is a wasteful number, since it uses less digits than its factorization.

85239554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42619779.

The product of its digits is 216000, while the sum is 41.

The square root of 85239554 is about 9232.5269563647. The cubic root of 85239554 is about 440.0956300406.

The spelling of 85239554 in words is "eighty-five million, two hundred thirty-nine thousand, five hundred fifty-four".