51405562 has 16 divisors (see below), whose sum is σ = 84212352. Its totient is φ = 23390640.

The previous prime is 51405539. The next prime is 51405577. The reversal of 51405562 is 26550415.

It is a self number, because there is not a number n which added to its sum of digits gives 51405562.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12078 + ... + 15769.

It is an arithmetic number, because the mean of its divisors is an integer number (5263272).

Almost surely, 2^51405562 is an apocalyptic number.

51405562 is a deficient number, since it is larger than the sum of its proper divisors (32806790).

51405562 is a wasteful number, since it uses less digits than its factorization.

51405562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27933.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 51405562 is about 7169.7672207680. The cubic root of 51405562 is about 371.8233880494.

Adding to 51405562 its reverse (26550415), we get a palindrome (77955977).

The spelling of 51405562 in words is "fifty-one million, four hundred five thousand, five hundred sixty-two".