71503130 has 8 divisors (see below), whose sum is σ = 128705652. Its totient is φ = 28601248.

The previous prime is 71503111. The next prime is 71503147. The reversal of 71503130 is 3130517.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71351809 + 151321 = 8447^2 + 389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71503130² = 10225395199593800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3575147 + ... + 3575166.

Almost surely, 2^71503130 is an apocalyptic number.

71503130 is a deficient number, since it is larger than the sum of its proper divisors (57202522).

71503130 is a wasteful number, since it uses less digits than its factorization.

71503130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150320.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 71503130 is about 8455.9523413983. The cubic root of 71503130 is about 415.0575814039.

Adding to 71503130 its reverse (3130517), we get a palindrome (74633647).

The spelling of 71503130 in words is "seventy-one million, five hundred three thousand, one hundred thirty".