51001553213 has 8 divisors (see below), whose sum is σ = 54930349656. Its totient is φ = 47073556800.

The previous prime is 51001553203. The next prime is 51001553237. The reversal of 51001553213 is 31235510015.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 411197284 + 50590355929 = 20278^2 + 224923^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51001553213 - 2⁸ = 51001552957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001553203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64178 + ... + 325763.

It is an arithmetic number, because the mean of its divisors is an integer number (6866293707).

Almost surely, 2^51001553213 is an apocalyptic number.

It is an amenable number.

51001553213 is a deficient number, since it is larger than the sum of its proper divisors (3928796443).

51001553213 is a wasteful number, since it uses less digits than its factorization.

51001553213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400015.

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 51001553213 in words is "fifty-one billion, one million, five hundred fifty-three thousand, two hundred thirteen".