81369350 has 24 divisors (see below), whose sum is σ = 151813200. Its totient is φ = 32447520.

The previous prime is 81369329. The next prime is 81369359. The reversal of 81369350 is 5396318.

It is a super-2 number, since 2×81369350² = 13241942238845000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81369350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81369359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15119 + ... + 19781.

It is an arithmetic number, because the mean of its divisors is an integer number (6325550).

Almost surely, 2^81369350 is an apocalyptic number.

81369350 is a deficient number, since it is larger than the sum of its proper divisors (70443850).

81369350 is a wasteful number, since it uses less digits than its factorization.

81369350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024 (or 5019 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 81369350 is about 9020.4961060908. The cubic root of 81369350 is about 433.3315220174.

The spelling of 81369350 in words is "eighty-one million, three hundred sixty-nine thousand, three hundred fifty".