51471556 has 24 divisors (see below), whose sum is σ = 92110424. Its totient is φ = 25159680.

The previous prime is 51471547. The next prime is 51471557. The reversal of 51471556 is 65517415.

It can be written as a sum of positive squares in 4 ways, for example, as 4137156 + 47334400 = 2034^2 + 6880^2 .

It is a super-2 number, since 2×51471556² = 5298642154122272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51471557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46546 + ... + 47638.

Almost surely, 2^51471556 is an apocalyptic number.

It is an amenable number.

51471556 is a deficient number, since it is larger than the sum of its proper divisors (40638868).

51471556 is a wasteful number, since it uses less digits than its factorization.

51471556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351 (or 1349 counting only the distinct ones).

The product of its digits is 21000, while the sum is 34.

The square root of 51471556 is about 7174.3679861016. The cubic root of 51471556 is about 371.9824345196.

The spelling of 51471556 in words is "fifty-one million, four hundred seventy-one thousand, five hundred fifty-six".