51153545 has 4 divisors (see below), whose sum is σ = 61384260. Its totient is φ = 40922832.

The previous prime is 51153539. The next prime is 51153577. The reversal of 51153545 is 54535115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54535115 = 5 ⋅10907023.

It can be written as a sum of positive squares in 2 ways, for example, as 7382089 + 43771456 = 2717^2 + 6616^2 .

It is a cyclic number.

It is not a de Polignac number, because 51153545 - 2¹⁴ = 51137161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5115350 + ... + 5115359.

It is an arithmetic number, because the mean of its divisors is an integer number (15346065).

Almost surely, 2^51153545 is an apocalyptic number.

It is an amenable number.

51153545 is a deficient number, since it is larger than the sum of its proper divisors (10230715).

51153545 is a wasteful number, since it uses less digits than its factorization.

51153545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230714.

The product of its digits is 7500, while the sum is 29.

The square root of 51153545 is about 7152.1706495301. The cubic root of 51153545 is about 371.2147680140.

The spelling of 51153545 in words is "fifty-one million, one hundred fifty-three thousand, five hundred forty-five".