51277215 has 16 divisors (see below), whose sum is σ = 89502336. Its totient is φ = 24861600.

The previous prime is 51277201. The next prime is 51277243.

51277215 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51277215 - 2¹² = 51273119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155221 + ... + 155550.

It is an arithmetic number, because the mean of its divisors is an integer number (5593896).

Almost surely, 2^51277215 is an apocalyptic number.

51277215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51277215 is a deficient number, since it is larger than the sum of its proper divisors (38225121).

51277215 is a wasteful number, since it uses less digits than its factorization.

51277215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310790.

The product of its digits is 4900, while the sum is 30.

The square root of 51277215 is about 7160.8110574152. The cubic root of 51277215 is about 371.5136797432.

The spelling of 51277215 in words is "fifty-one million, two hundred seventy-seven thousand, two hundred fifteen".