51451050 has 96 divisors (see below), whose sum is σ = 153561600. Its totient is φ = 11136960.

The previous prime is 51451039. The next prime is 51451087. The reversal of 51451050 is 5015415.

51451050 = 785² + 786² + ... + 860².

It is a super-2 number, since 2×51451050² = 5294421092205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18661 + ... + 21239.

It is an arithmetic number, because the mean of its divisors is an integer number (1599600).

Almost surely, 2^51451050 is an apocalyptic number.

51451050 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 51451050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76780800).

51451050 is an abundant number, since it is smaller than the sum of its proper divisors (102110550).

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

51451050 is a wasteful number, since it uses less digits than its factorization.

51451050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620 (or 2615 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51451050 is about 7172.9387283038. The cubic root of 51451050 is about 371.9330293362.

Adding to 51451050 its reverse (5015415), we get a palindrome (56466465).

The spelling of 51451050 in words is "fifty-one million, four hundred fifty-one thousand, fifty".