51451015 has 24 divisors (see below), whose sum is σ = 77565600. Its totient is φ = 32070720.

The previous prime is 51451003. The next prime is 51451021. The reversal of 51451015 is 51015415.

It is a happy number.

It is not a de Polignac number, because 51451015 - 2⁷ = 51450887 is a prime.

It is a super-3 number, since 3×51451015³ (a number of 24 digits) contains 333 as substring.

It is a congruent 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, 1840 + ... + 10309.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^51451015 is an apocalyptic number.

51451015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51451015 is a deficient number, since it is larger than the sum of its proper divisors (26114585).

51451015 is a wasteful number, since it uses less digits than its factorization.

51451015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12183 (or 12172 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 51451015 is about 7172.9362885781. The cubic root of 51451015 is about 371.9329449993.

Subtracting from 51451015 its reverse (51015415), we obtain a square (435600 = 660²).

It can be divided in two parts, 514 and 51015, that added together give a square (51529 = 227²).

The spelling of 51451015 in words is "fifty-one million, four hundred fifty-one thousand, fifteen".