51400415 has 32 divisors (see below), whose sum is σ = 71677440. Its totient is φ = 34992000.

The previous prime is 51400411. The next prime is 51400421.

51400415 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51400415 - 2² = 51400411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51400411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105302 + ... + 105788.

It is an arithmetic number, because the mean of its divisors is an integer number (2239920).

Almost surely, 2^51400415 is an apocalyptic number.

51400415 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51400415 is a deficient number, since it is larger than the sum of its proper divisors (20277025).

51400415 is a wasteful number, since it uses less digits than its factorization.

51400415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51400415 is about 7169.4082740488. The cubic root of 51400415 is about 371.8109779860.

It can be divided in two parts, 51400 and 415, that added together give a palindrome (51815).

The spelling of 51400415 in words is "fifty-one million, four hundred thousand, four hundred fifteen".