51340422 has 32 divisors (see below), whose sum is σ = 118022400. Its totient is φ = 14584608.

The previous prime is 51340381. The next prime is 51340463. The reversal of 51340422 is 22404315.

It is an interprime number because it is at equal distance from previous prime (51340381) and next prime (51340463).

It is a super-2 number, since 2×51340422² = 5271677862276168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 4104 + ... + 10932.

It is an arithmetic number, because the mean of its divisors is an integer number (3688200).

Almost surely, 2^51340422 is an apocalyptic number.

51340422 is an abundant number, since it is smaller than the sum of its proper divisors (66681978).

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

51340422 is a wasteful number, since it uses less digits than its factorization.

51340422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 51340422 is about 7165.2230949217. The cubic root of 51340422 is about 371.6662661845. Note that the first 3 decimals are identical.

Adding to 51340422 its reverse (22404315), we get a palindrome (73744737).

The spelling of 51340422 in words is "fifty-one million, three hundred forty thousand, four hundred twenty-two".