51249099 has 16 divisors (see below), whose sum is σ = 78468480. Its totient is φ = 29424960.

The previous prime is 51249071. The next prime is 51249103. The reversal of 51249099 is 99094215.

It is not a de Polignac number, because 51249099 - 2⁷ = 51248971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51249019) 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, 40242 + ... + 41495.

It is an arithmetic number, because the mean of its divisors is an integer number (4904280).

Almost surely, 2^51249099 is an apocalyptic number.

51249099 is a deficient number, since it is larger than the sum of its proper divisors (27219381).

51249099 is a wasteful number, since it uses less digits than its factorization.

51249099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81770.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 51249099 is about 7158.8476027919. The cubic root of 51249099 is about 371.4457653142.

The spelling of 51249099 in words is "fifty-one million, two hundred forty-nine thousand, ninety-nine".