71515010 has 24 divisors (see below), whose sum is σ = 149744700. Its totient is φ = 24519264.

The previous prime is 71515007. The next prime is 71515013. The reversal of 71515010 is 1051517.

It is an interprime number because it is at equal distance from previous prime (71515007) and next prime (71515013).

It can be written as a sum of positive squares in 2 ways, for example, as 64915249 + 6599761 = 8057^2 + 2569^2 .

It is a super-2 number, since 2×71515010² = 10228793310600200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71515013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72485 + ... + 73464.

Almost surely, 2^71515010 is an apocalyptic number.

71515010 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71515010 is an abundant number, since it is smaller than the sum of its proper divisors (78229690).

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

71515010 is a wasteful number, since it uses less digits than its factorization.

71515010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145970 (or 145963 counting only the distinct ones).

The product of its (nonzero) digits is 175, while the sum is 20.

The square root of 71515010 is about 8456.6547759738. The cubic root of 71515010 is about 415.0805669292.

Adding to 71515010 its reverse (1051517), we get a palindrome (72566527).

The spelling of 71515010 in words is "seventy-one million, five hundred fifteen thousand, ten".