51542850 has 72 divisors (see below), whose sum is σ = 131897808. Its totient is φ = 13320000.

The previous prime is 51542809. The next prime is 51542851. The reversal of 51542850 is 5824515.

It is a super-2 number, since 2×51542850² = 5313330772245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51542851) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 205225 + ... + 205475.

It is an arithmetic number, because the mean of its divisors is an integer number (1831914).

Almost surely, 2^51542850 is an apocalyptic number.

51542850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51542850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65948904).

51542850 is an abundant number, since it is smaller than the sum of its proper divisors (80354958).

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

51542850 is a wasteful number, since it uses less digits than its factorization.

51542850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 51542850 is about 7179.3349274149. The cubic root of 51542850 is about 372.1541013759.

It can be divided in two parts, 515 and 42850, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 51542850 in words is "fifty-one million, five hundred forty-two thousand, eight hundred fifty".