51261470 has 16 divisors (see below), whose sum is σ = 99368640. Its totient is φ = 18927264.

The previous prime is 51261451. The next prime is 51261481. The reversal of 51261470 is 7416215.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 197030 + ... + 197289.

It is an arithmetic number, because the mean of its divisors is an integer number (6210540).

Almost surely, 2^51261470 is an apocalyptic number.

51261470 is a deficient number, since it is larger than the sum of its proper divisors (48107170).

51261470 is a wasteful number, since it uses less digits than its factorization.

51261470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394339.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 51261470 is about 7159.7115863699. The cubic root of 51261470 is about 371.4756506258.

Adding to 51261470 its reverse (7416215), we get a palindrome (58677685).

The spelling of 51261470 in words is "fifty-one million, two hundred sixty-one thousand, four hundred seventy".