7213877811 has 24 divisors (see below), whose sum is σ = 12059374080. Its totient is φ = 4070033136.

The previous prime is 7213877809. The next prime is 7213877837. The reversal of 7213877811 is 1187783127.

It is a happy number.

It is not a de Polignac number, because 7213877811 - 2¹ = 7213877809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7213877911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 719745 + ... + 729698.

It is an arithmetic number, because the mean of its divisors is an integer number (502473920).

Almost surely, 2^7213877811 is an apocalyptic number.

7213877811 is a deficient number, since it is larger than the sum of its proper divisors (4845496269).

7213877811 is a wasteful number, since it uses less digits than its factorization.

7213877811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449535 (or 1449532 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The square root of 7213877811 is about 84934.5501606973. The cubic root of 7213877811 is about 1932.2186099285.

The spelling of 7213877811 in words is "seven billion, two hundred thirteen million, eight hundred seventy-seven thousand, eight hundred eleven".