51220299 has 16 divisors (see below), whose sum is σ = 74228000. Its totient is φ = 31228416.

The previous prime is 51220291. The next prime is 51220307. The reversal of 51220299 is 99202215.

It is an interprime number because it is at equal distance from previous prime (51220291) and next prime (51220307).

It is not a de Polignac number, because 51220299 - 2³ = 51220291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51220291) 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, 1774 + ... + 10275.

It is an arithmetic number, because the mean of its divisors is an integer number (4639250).

Almost surely, 2^51220299 is an apocalyptic number.

51220299 is a deficient number, since it is larger than the sum of its proper divisors (23007701).

51220299 is a wasteful number, since it uses less digits than its factorization.

51220299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12174.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 51220299 is about 7156.8358231833. The cubic root of 51220299 is about 371.3761729197.

The spelling of 51220299 in words is "fifty-one million, two hundred twenty thousand, two hundred ninety-nine".