71030253 has 24 divisors (see below), whose sum is σ = 111004992. Its totient is φ = 40281024.

The previous prime is 71030231. The next prime is 71030263. The reversal of 71030253 is 35203017.

It is a happy number.

It is not a de Polignac number, because 71030253 - 2⁵ = 71030221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71030213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18376 + ... + 21902.

It is an arithmetic number, because the mean of its divisors is an integer number (4625208).

Almost surely, 2^71030253 is an apocalyptic number.

It is an amenable number.

71030253 is a deficient number, since it is larger than the sum of its proper divisors (39974739).

71030253 is a wasteful number, since it uses less digits than its factorization.

71030253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681 (or 3674 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 71030253 is about 8427.9447672609. The cubic root of 71030253 is about 414.1405798112.

The spelling of 71030253 in words is "seventy-one million, thirty thousand, two hundred fifty-three".