81525034 has 4 divisors (see below), whose sum is σ = 122287554. Its totient is φ = 40762516.

The previous prime is 81524999. The next prime is 81525089. The reversal of 81525034 is 43052518.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 80048809 + 1476225 = 8947^2 + 1215^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81524993 and 81525011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20381257 + ... + 20381260.

Almost surely, 2^81525034 is an apocalyptic number.

81525034 is a deficient number, since it is larger than the sum of its proper divisors (40762520).

81525034 is a wasteful number, since it uses less digits than its factorization.

81525034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40762519.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 81525034 is about 9029.1214412035. The cubic root of 81525034 is about 433.6077103890.

The spelling of 81525034 in words is "eighty-one million, five hundred twenty-five thousand, thirty-four".