813542002 has 36 divisors (see below), whose sum is σ = 1537174746. Its totient is φ = 321834240.

The previous prime is 813541999. The next prime is 813542011. The reversal of 813542002 is 200245318.

It can be written as a sum of positive squares in 3 ways, for example, as 200533921 + 613008081 = 14161^2 + 24759^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7999 + ... + 41122.

Almost surely, 2^813542002 is an apocalyptic number.

813542002 is a deficient number, since it is larger than the sum of its proper divisors (723632744).

813542002 is a wasteful number, since it uses less digits than its factorization.

813542002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49163 (or 49143 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 813542002 is about 28522.6576952429. The cubic root of 813542002 is about 933.5265197327.

The spelling of 813542002 in words is "eight hundred thirteen million, five hundred forty-two thousand, two".