51090545 has 16 divisors (see below), whose sum is σ = 67099968. Its totient is φ = 37035840.

The previous prime is 51090541. The next prime is 51090553. The reversal of 51090545 is 54509015.

It is not a de Polignac number, because 51090545 - 2² = 51090541 is a prime.

It is a super-3 number, since 3×51090545³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51090541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17747 + ... + 20423.

It is an arithmetic number, because the mean of its divisors is an integer number (4193748).

Almost surely, 2^51090545 is an apocalyptic number.

51090545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51090545 is a deficient number, since it is larger than the sum of its proper divisors (16009423).

51090545 is a wasteful number, since it uses less digits than its factorization.

51090545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 51090545 is about 7147.7650353100. The cubic root of 51090545 is about 371.0623110806.

The spelling of 51090545 in words is "fifty-one million, ninety thousand, five hundred forty-five".