51022464 has 128 divisors (see below), whose sum is σ = 145411200. Its totient is φ = 15814656.

The previous prime is 51022459. The next prime is 51022481. The reversal of 51022464 is 46422015.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468042 + ... + 468150.

It is an arithmetic number, because the mean of its divisors is an integer number (1136025).

Almost surely, 2^51022464 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 51022464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72705600).

51022464 is an abundant number, since it is smaller than the sum of its proper divisors (94388736).

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

51022464 is a wasteful number, since it uses less digits than its factorization.

51022464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 51022464 is about 7143.0010499789. The cubic root of 51022464 is about 370.8974174090.

Adding to 51022464 its reverse (46422015), we get a palindrome (97444479).

The spelling of 51022464 in words is "fifty-one million, twenty-two thousand, four hundred sixty-four".