51001501 has 4 divisors (see below), whose sum is σ = 51719904. Its totient is φ = 50283100.

The previous prime is 51001493. The next prime is 51001519. The reversal of 51001501 is 10510015.

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.

It is a cyclic number.

It is not a de Polignac number, because 51001501 - 2³ = 51001493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001571) 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, 359095 + ... + 359236.

It is an arithmetic number, because the mean of its divisors is an integer number (12929976).

Almost surely, 2^51001501 is an apocalyptic number.

It is an amenable number.

51001501 is a deficient number, since it is larger than the sum of its proper divisors (718403).

51001501 is an equidigital number, since it uses as much as digits as its factorization.

51001501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718402.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 51001501 is about 7141.5335187899. The cubic root of 51001501 is about 370.8466150302.

Adding to 51001501 its reverse (10510015), we get a palindrome (61511516).

The spelling of 51001501 in words is "fifty-one million, one thousand, five hundred one".