85257550 has 144 divisors (see below), whose sum is σ = 206102880. Its totient is φ = 26019840.

The previous prime is 85257547. The next prime is 85257563. The reversal of 85257550 is 5575258.

It is a super-3 number, since 3×85257550³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 957906 + ... + 957994.

It is an arithmetic number, because the mean of its divisors is an integer number (1431270).

Almost surely, 2^85257550 is an apocalyptic number.

85257550 is an abundant number, since it is smaller than the sum of its proper divisors (120845330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85257550 is a wasteful number, since it uses less digits than its factorization.

85257550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 85257550 is about 9233.5015026803. The cubic root of 85257550 is about 440.1265992456.

The spelling of 85257550 in words is "eighty-five million, two hundred fifty-seven thousand, five hundred fifty".