51243045 has 32 divisors (see below), whose sum is σ = 94402560. Its totient is φ = 23250240.

The previous prime is 51243041. The next prime is 51243053. The reversal of 51243045 is 54034215.

It is not a de Polignac number, because 51243045 - 2² = 51243041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51243041) 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, 12840 + ... + 16350.

It is an arithmetic number, because the mean of its divisors is an integer number (2950080).

Almost surely, 2^51243045 is an apocalyptic number.

It is an amenable number.

51243045 is a deficient number, since it is larger than the sum of its proper divisors (43159515).

51243045 is a wasteful number, since it uses less digits than its factorization.

51243045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 51243045 is about 7158.4247568861. The cubic root of 51243045 is about 371.4311385776.

The spelling of 51243045 in words is "fifty-one million, two hundred forty-three thousand, forty-five".