51561070 has 16 divisors (see below), whose sum is σ = 101247408. Its totient is φ = 18749440.

The previous prime is 51561061. The next prime is 51561127. The reversal of 51561070 is 7016515.

It is a congruent number.

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, 234259 + ... + 234478.

It is an arithmetic number, because the mean of its divisors is an integer number (6327963).

Almost surely, 2^51561070 is an apocalyptic number.

51561070 is a deficient number, since it is larger than the sum of its proper divisors (49686338).

51561070 is a wasteful number, since it uses less digits than its factorization.

51561070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468755.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 51561070 is about 7180.6037350630. The cubic root of 51561070 is about 372.1979474116.

Adding to 51561070 its reverse (7016515), we get a palindrome (58577585).

It can be divided in two parts, 5156 and 1070, that added together give a palindrome (6226).

The spelling of 51561070 in words is "fifty-one million, five hundred sixty-one thousand, seventy".