51531064 has 16 divisors (see below), whose sum is σ = 104053320. Its totient is φ = 23783520.

The previous prime is 51531061. The next prime is 51531079. The reversal of 51531064 is 46013515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51531061) by changing a digit.

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, 247642 + ... + 247849.

Almost surely, 2^51531064 is an apocalyptic number.

It is an amenable number.

51531064 is an abundant number, since it is smaller than the sum of its proper divisors (52522256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51531064 is a wasteful number, since it uses less digits than its factorization.

51531064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495510 (or 495506 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51531064 is about 7178.5140523649. The cubic root of 51531064 is about 372.1257331179.

Adding to 51531064 its reverse (46013515), we get a palindrome (97544579).

The spelling of 51531064 in words is "fifty-one million, five hundred thirty-one thousand, sixty-four".