51488493 has 16 divisors (see below), whose sum is σ = 79940736. Its totient is φ = 28866240.

The previous prime is 51488491. The next prime is 51488509. The reversal of 51488493 is 39488415.

It is not a de Polignac number, because 51488493 - 2¹ = 51488491 is a prime.

It is a super-2 number, since 2×51488493² = 5302129822822098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51488491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22018 + ... + 24243.

It is an arithmetic number, because the mean of its divisors is an integer number (4996296).

Almost surely, 2^51488493 is an apocalyptic number.

51488493 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51488493 is a deficient number, since it is larger than the sum of its proper divisors (28452243).

51488493 is a wasteful number, since it uses less digits than its factorization.

51488493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46324.

The product of its digits is 138240, while the sum is 42.

The square root of 51488493 is about 7175.5482717351. The cubic root of 51488493 is about 372.0232310038.

The spelling of 51488493 in words is "fifty-one million, four hundred eighty-eight thousand, four hundred ninety-three".