51121253 has 2 divisors, whose sum is σ = 51121254. Its totient is φ = 51121252.

The previous prime is 51121237. The next prime is 51121307. The reversal of 51121253 is 35212115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26697889 + 24423364 = 5167^2 + 4942^2 .

It is a cyclic number.

It is not a de Polignac number, because 51121253 - 2⁴ = 51121237 is a prime.

It is a super-2 number, since 2×51121253² = 5226765016580018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51120253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25560626 + 25560627.

It is an arithmetic number, because the mean of its divisors is an integer number (25560627).

Almost surely, 2^51121253 is an apocalyptic number.

It is an amenable number.

51121253 is a deficient number, since it is larger than the sum of its proper divisors (1).

51121253 is an equidigital number, since it uses as much as digits as its factorization.

51121253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 20.

The square root of 51121253 is about 7149.9127966710. The cubic root of 51121253 is about 371.1366385927.

Adding to 51121253 its reverse (35212115), we get a palindrome (86333368).

The spelling of 51121253 in words is "fifty-one million, one hundred twenty-one thousand, two hundred fifty-three".