81627051 has 8 divisors (see below), whose sum is σ = 118730304. Its totient is φ = 49470920.

The previous prime is 81627041. The next prime is 81627053. The reversal of 81627051 is 15072618.

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

It is a cyclic number.

It is not a de Polignac number, because 81627051 - 2¹¹ = 81625003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81627053) 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, 1236741 + ... + 1236806.

It is an arithmetic number, because the mean of its divisors is an integer number (14841288).

Almost surely, 2^81627051 is an apocalyptic number.

81627051 is a deficient number, since it is larger than the sum of its proper divisors (37103253).

81627051 is a wasteful number, since it uses less digits than its factorization.

81627051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473561.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 81627051 is about 9034.7690064550. The cubic root of 81627051 is about 433.7885011516.

Adding to 81627051 its reverse (15072618), we get a palindrome (96699669).

The spelling of 81627051 in words is "eighty-one million, six hundred twenty-seven thousand, fifty-one".