51140545 has 16 divisors (see below), whose sum is σ = 64829952. Its totient is φ = 38666880.

The previous prime is 51140491. The next prime is 51140563. The reversal of 51140545 is 54504115.

It is a happy number.

It is not a de Polignac number, because 51140545 - 2¹³ = 51132353 is a prime.

It is a Duffinian 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, 2829 + ... + 10501.

It is an arithmetic number, because the mean of its divisors is an integer number (4051872).

Almost surely, 2^51140545 is an apocalyptic number.

It is an amenable number.

51140545 is a deficient number, since it is larger than the sum of its proper divisors (13689407).

51140545 is a wasteful number, since it uses less digits than its factorization.

51140545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 51140545 is about 7151.2617767776. The cubic root of 51140545 is about 371.1833189010.

The spelling of 51140545 in words is "fifty-one million, one hundred forty thousand, five hundred forty-five".