51702144 has 64 divisors (see below), whose sum is σ = 147912240. Its totient is φ = 15906816.

The previous prime is 51702121. The next prime is 51702149. The reversal of 51702144 is 44120715.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×51702144² = 5346223388393472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51702149) 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, 187 + ... + 10170.

Almost surely, 2^51702144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51702144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73956120).

51702144 is an abundant number, since it is smaller than the sum of its proper divisors (96210096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51702144 is a wasteful number, since it uses less digits than its factorization.

51702144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10387 (or 10375 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 51702144 is about 7190.4202936963. The cubic root of 51702144 is about 372.5370898312.

Adding to 51702144 its reverse (44120715), we get a palindrome (95822859).

The spelling of 51702144 in words is "fifty-one million, seven hundred two thousand, one hundred forty-four".