51405052 has 12 divisors (see below), whose sum is σ = 93061080. Its totient is φ = 24816176.

The previous prime is 51405049. The next prime is 51405073. The reversal of 51405052 is 25050415.

It is a super-2 number, since 2×51405052² = 5284958742245408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221458 + ... + 221689.

It is an arithmetic number, because the mean of its divisors is an integer number (7755090).

Almost surely, 2^51405052 is an apocalyptic number.

It is an amenable number.

51405052 is a deficient number, since it is larger than the sum of its proper divisors (41656028).

51405052 is a wasteful number, since it uses less digits than its factorization.

51405052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443180 (or 443178 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51405052 is about 7169.7316546716. The cubic root of 51405052 is about 371.8221584123.

Adding to 51405052 its reverse (25050415), we get a palindrome (76455467).

The spelling of 51405052 in words is "fifty-one million, four hundred five thousand, fifty-two".