51023636 has 6 divisors (see below), whose sum is σ = 89291370. Its totient is φ = 25511816.

The previous prime is 51023597. The next prime is 51023657. The reversal of 51023636 is 63632015.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 7595536 = 6590^2 + 2756^2 .

It is a super-2 number, since 2×51023636² = 5206822861320992, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 6377951 + ... + 6377958.

It is an arithmetic number, because the mean of its divisors is an integer number (14881895).

Almost surely, 2^51023636 is an apocalyptic number.

It is an amenable number.

51023636 is a deficient number, since it is larger than the sum of its proper divisors (38267734).

51023636 is a wasteful number, since it uses less digits than its factorization.

51023636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12755913 (or 12755911 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 51023636 is about 7143.0830878550. The cubic root of 51023636 is about 370.9002572591.

The spelling of 51023636 in words is "fifty-one million, twenty-three thousand, six hundred thirty-six".