77213223001 has 4 divisors (see below), whose sum is σ = 78479013604. Its totient is φ = 75947432400.

The previous prime is 77213222969. The next prime is 77213223011. The reversal of 77213223001 is 10032231277.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9321709401 + 67891513600 = 96549^2 + 260560^2 .

It is a cyclic number.

It is not a de Polignac number, because 77213223001 - 2⁵ = 77213222969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77213223011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632895210 + ... + 632895331.

It is an arithmetic number, because the mean of its divisors is an integer number (19619753401).

Almost surely, 2^77213223001 is an apocalyptic number.

It is an amenable number.

77213223001 is a deficient number, since it is larger than the sum of its proper divisors (1265790603).

77213223001 is a wasteful number, since it uses less digits than its factorization.

77213223001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265790602.

The product of its (nonzero) digits is 3528, while the sum is 28.

Adding to 77213223001 its reverse (10032231277), we get a palindrome (87245454278).

The spelling of 77213223001 in words is "seventy-seven billion, two hundred thirteen million, two hundred twenty-three thousand, one".