51400546 has 4 divisors (see below), whose sum is σ = 77100822. Its totient is φ = 25700272.

The previous prime is 51400507. The next prime is 51400577. The reversal of 51400546 is 64500415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33005025 + 18395521 = 5745^2 + 4289^2 .

It is a super-2 number, since 2×51400546² = 5284032258196232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51400546.

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 as a sum of consecutive naturals, namely, 12850135 + ... + 12850138.

Almost surely, 2^51400546 is an apocalyptic number.

51400546 is a deficient number, since it is larger than the sum of its proper divisors (25700276).

51400546 is a wasteful number, since it uses less digits than its factorization.

51400546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25700275.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51400546 is about 7169.4174100829. The cubic root of 51400546 is about 371.8112938537.

The spelling of 51400546 in words is "fifty-one million, four hundred thousand, five hundred forty-six".