71155290 has 32 divisors (see below), whose sum is σ = 173117376. Its totient is φ = 18714240.

The previous prime is 71155283. The next prime is 71155291. The reversal of 71155290 is 9255117.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (71155291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14056 + ... + 18435.

It is an arithmetic number, because the mean of its divisors is an integer number (5409918).

Almost surely, 2^71155290 is an apocalyptic number.

71155290 is an abundant number, since it is smaller than the sum of its proper divisors (101962086).

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

71155290 is a wasteful number, since it uses less digits than its factorization.

71155290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32574.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 71155290 is about 8435.3595062688. The cubic root of 71155290 is about 414.3834459990.

The spelling of 71155290 in words is "seventy-one million, one hundred fifty-five thousand, two hundred ninety".