51452030213 has 4 divisors (see below), whose sum is σ = 51907358028. Its totient is φ = 50996702400.

The previous prime is 51452030177. The next prime is 51452030263. The reversal of 51452030213 is 31203025415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31203025415 = 5 ⋅6240605083.

It can be written as a sum of positive squares in 2 ways, for example, as 27704603809 + 23747426404 = 166447^2 + 154102^2 .

It is a cyclic number.

It is not a de Polignac number, because 51452030213 - 2³² = 47157062917 is a prime.

It is a super-2 number, since 2×51452030213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51452030263) 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, 227663738 + ... + 227663963.

It is an arithmetic number, because the mean of its divisors is an integer number (12976839507).

Almost surely, 2^51452030213 is an apocalyptic number.

It is an amenable number.

51452030213 is a deficient number, since it is larger than the sum of its proper divisors (455327815).

51452030213 is a wasteful number, since it uses less digits than its factorization.

51452030213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455327814.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 51452030213 its reverse (31203025415), we get a palindrome (82655055628).

The spelling of 51452030213 in words is "fifty-one billion, four hundred fifty-two million, thirty thousand, two hundred thirteen".