51151521001 has 4 divisors (see below), whose sum is σ = 58458881152. Its totient is φ = 43844160852.

The previous prime is 51151520851. The next prime is 51151521049. The reversal of 51151521001 is 10012515115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10012515115 = 5 ⋅2002503023.

It is a cyclic number.

It is not a de Polignac number, because 51151521001 - 2⁹ = 51151520489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51151531001) 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, 3653680065 + ... + 3653680078.

It is an arithmetic number, because the mean of its divisors is an integer number (14614720288).

Almost surely, 2^51151521001 is an apocalyptic number.

It is an amenable number.

51151521001 is a deficient number, since it is larger than the sum of its proper divisors (7307360151).

51151521001 is an equidigital number, since it uses as much as digits as its factorization.

51151521001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7307360150.

The product of its (nonzero) digits is 250, while the sum is 22.

The spelling of 51151521001 in words is "fifty-one billion, one hundred fifty-one million, five hundred twenty-one thousand, one".