8261213542 has 4 divisors (see below), whose sum is σ = 12391820316. Its totient is φ = 4130606770.

The previous prime is 8261213503. The next prime is 8261213561. The reversal of 8261213542 is 2453121628.

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

It is a junction number, because it is equal to n+sod(n) for n = 8261213498 and 8261213507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065303384 + ... + 2065303387.

It is an arithmetic number, because the mean of its divisors is an integer number (3097955079).

Almost surely, 2^8261213542 is an apocalyptic number.

8261213542 is a deficient number, since it is larger than the sum of its proper divisors (4130606774).

8261213542 is a wasteful number, since it uses less digits than its factorization.

8261213542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130606773.

The product of its digits is 23040, while the sum is 34.

The square root of 8261213542 is about 90891.2181786557. The cubic root of 8261213542 is about 2021.5350830078.

The spelling of 8261213542 in words is "eight billion, two hundred sixty-one million, two hundred thirteen thousand, five hundred forty-two".