51488501 has 4 divisors (see below), whose sum is σ = 52685952. Its totient is φ = 50291052.

The previous prime is 51488491. The next prime is 51488509. The reversal of 51488501 is 10588415.

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 a de Polignac number, because none of the positive numbers 2^k-51488501 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 (51488509) 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, 598661 + ... + 598746.

It is an arithmetic number, because the mean of its divisors is an integer number (13171488).

Almost surely, 2^51488501 is an apocalyptic number.

It is an amenable number.

51488501 is a deficient number, since it is larger than the sum of its proper divisors (1197451).

51488501 is a wasteful number, since it uses less digits than its factorization.

51488501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197450.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 51488501 is about 7175.5488291837. The cubic root of 51488501 is about 372.0232502715.

The spelling of 51488501 in words is "fifty-one million, four hundred eighty-eight thousand, five hundred one".