51020264 has 16 divisors (see below), whose sum is σ = 101290500. Its totient is φ = 24009472.

The previous prime is 51020237. The next prime is 51020269. The reversal of 51020264 is 46202015.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 12100 = 7142^2 + 110^2 .

It is not an unprimeable number, because it can be changed into a prime (51020269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187439 + ... + 187710.

Almost surely, 2^51020264 is an apocalyptic number.

It is an amenable number.

51020264 is a deficient number, since it is larger than the sum of its proper divisors (50270236).

51020264 is a wasteful number, since it uses less digits than its factorization.

51020264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375172 (or 375168 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51020264 is about 7142.8470514214. The cubic root of 51020264 is about 370.8920865150.

Adding to 51020264 its reverse (46202015), we get a palindrome (97222279).

The spelling of 51020264 in words is "fifty-one million, twenty thousand, two hundred sixty-four".