51342550 has 48 divisors (see below), whose sum is σ = 115572960. Its totient is φ = 16565760.

The previous prime is 51342527. The next prime is 51342553. The reversal of 51342550 is 5524315.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51342553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1636 + ... + 10264.

It is an arithmetic number, because the mean of its divisors is an integer number (2407770).

Almost surely, 2^51342550 is an apocalyptic number.

51342550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51342550 is an abundant number, since it is smaller than the sum of its proper divisors (64230410).

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

51342550 is a wasteful number, since it uses less digits than its factorization.

51342550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8665 (or 8660 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 51342550 is about 7165.3715884105. The cubic root of 51342550 is about 371.6714011565.

Adding to 51342550 its reverse (5524315), we get a palindrome (56866865).

The spelling of 51342550 in words is "fifty-one million, three hundred forty-two thousand, five hundred fifty".