51302145 has 32 divisors (see below), whose sum is σ = 85473792. Its totient is φ = 26254592.

The previous prime is 51302129. The next prime is 51302161. The reversal of 51302145 is 54120315.

Added to its reverse (54120315) it gives a triangular number (105422460 = T₁₄₅₂₀).

It is an interprime number because it is at equal distance from previous prime (51302129) and next prime (51302161).

It is a cyclic number.

It is not a de Polignac number, because 51302145 - 2⁴ = 51302129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36679 + ... + 38051.

It is an arithmetic number, because the mean of its divisors is an integer number (2671056).

Almost surely, 2^51302145 is an apocalyptic number.

It is an amenable number.

51302145 is a deficient number, since it is larger than the sum of its proper divisors (34171647).

51302145 is a wasteful number, since it uses less digits than its factorization.

51302145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51302145 is about 7162.5515704950. The cubic root of 51302145 is about 371.5738776009.

Adding to 51302145 its reverse (54120315), we get a triangular number (105422460 = T₁₄₅₂₀).

The spelling of 51302145 in words is "fifty-one million, three hundred two thousand, one hundred forty-five".