51422364 has 180 divisors, whose sum is σ = 162217440. Its totient is φ = 14152320.

The previous prime is 51422363. The next prime is 51422369. The reversal of 51422364 is 46322415.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51422363) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 650877 + ... + 650955.

It is an arithmetic number, because the mean of its divisors is an integer number (901208).

Almost surely, 2^51422364 is an apocalyptic number.

51422364 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51422364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81108720).

51422364 is an abundant number, since it is smaller than the sum of its proper divisors (110795076).

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

51422364 is a wasteful number, since it uses less digits than its factorization.

51422364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 132 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 51422364 is about 7170.9388506666. The cubic root of 51422364 is about 371.8638940167.

Adding to 51422364 its reverse (46322415), we get a palindrome (97744779).

The spelling of 51422364 in words is "fifty-one million, four hundred twenty-two thousand, three hundred sixty-four".