51103578 has 32 divisors (see below), whose sum is σ = 108195840. Its totient is φ = 16046640.

The previous prime is 51103571. The next prime is 51103579. The reversal of 51103578 is 87530115.

It is a super-2 number, since 2×51103578² = 5223151368804168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51103571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20601 + ... + 22947.

It is an arithmetic number, because the mean of its divisors is an integer number (3381120).

Almost surely, 2^51103578 is an apocalyptic number.

51103578 is an abundant number, since it is smaller than the sum of its proper divisors (57092262).

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

51103578 is a wasteful number, since it uses less digits than its factorization.

51103578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 51103578 is about 7148.6766607534. The cubic root of 51103578 is about 371.0938605838.

It can be divided in two parts, 51103 and 578, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 51103578 in words is "fifty-one million, one hundred three thousand, five hundred seventy-eight".