51061251 has 16 divisors (see below), whose sum is σ = 72412704. Its totient is φ = 31893504.

The previous prime is 51061249. The next prime is 51061259. The reversal of 51061251 is 15216015.

It is not a de Polignac number, because 51061251 - 2¹ = 51061249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51061259) 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, 9735 + ... + 14031.

It is an arithmetic number, because the mean of its divisors is an integer number (4525794).

Almost surely, 2^51061251 is an apocalyptic number.

51061251 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51061251 is a deficient number, since it is larger than the sum of its proper divisors (21351453).

51061251 is a wasteful number, since it uses less digits than its factorization.

51061251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4550.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 51061251 is about 7145.7155694864. The cubic root of 51061251 is about 370.9913783375.

Adding to 51061251 its reverse (15216015), we get a palindrome (66277266).

The spelling of 51061251 in words is "fifty-one million, sixty-one thousand, two hundred fifty-one".