81315098 has 16 divisors (see below), whose sum is σ = 130572000. Its totient is φ = 37863792.

The previous prime is 81315083. The next prime is 81315103. The reversal of 81315098 is 89051318.

It is a super-2 number, since 2×81315098² = 13224290325499208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15893 + ... + 20376.

It is an arithmetic number, because the mean of its divisors is an integer number (8160750).

Almost surely, 2^81315098 is an apocalyptic number.

81315098 is a deficient number, since it is larger than the sum of its proper divisors (49256902).

81315098 is a wasteful number, since it uses less digits than its factorization.

81315098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36349.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 81315098 is about 9017.4884530006. The cubic root of 81315098 is about 433.2351944753.

The spelling of 81315098 in words is "eighty-one million, three hundred fifteen thousand, ninety-eight".