81502414 has 16 divisors (see below), whose sum is σ = 139902048. Its totient is φ = 34883712.

The previous prime is 81502387. The next prime is 81502417. The reversal of 81502414 is 41420518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81502417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8602 + ... + 15394.

It is an arithmetic number, because the mean of its divisors is an integer number (8743878).

Almost surely, 2^81502414 is an apocalyptic number.

81502414 is a deficient number, since it is larger than the sum of its proper divisors (58399634).

81502414 is a wasteful number, since it uses less digits than its factorization.

81502414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 81502414 is about 9027.8687407383. The cubic root of 81502414 is about 433.5676036341.

The spelling of 81502414 in words is "eighty-one million, five hundred two thousand, four hundred fourteen".