51263155 has 24 divisors (see below), whose sum is σ = 64969632. Its totient is φ = 38820096.

The previous prime is 51263129. The next prime is 51263189. The reversal of 51263155 is 55136215.

It is not a de Polignac number, because 51263155 - 2⁹ = 51262643 is a prime.

It is a super-2 number, since 2×51263155² = 5255822121108050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306882 + ... + 307048.

It is an arithmetic number, because the mean of its divisors is an integer number (2707068).

Almost surely, 2^51263155 is an apocalyptic number.

51263155 is a deficient number, since it is larger than the sum of its proper divisors (13706477).

51263155 is a wasteful number, since it uses less digits than its factorization.

51263155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 274 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 51263155 is about 7159.8292577407. The cubic root of 51263155 is about 371.4797208018.

It can be divided in two parts, 5126 and 3155, that added together give a square (8281 = 91²).

The spelling of 51263155 in words is "fifty-one million, two hundred sixty-three thousand, one hundred fifty-five".