51223347 has 40 divisors (see below), whose sum is σ = 88943712. Its totient is φ = 28771200.

The previous prime is 51223343. The next prime is 51223357. The reversal of 51223347 is 74332215.

It is not a de Polignac number, because 51223347 - 2² = 51223343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51223347.

It is not an unprimeable number, because it can be changed into a prime (51223343) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33847 + ... + 35327.

Almost surely, 2^51223347 is an apocalyptic number.

51223347 is a deficient number, since it is larger than the sum of its proper divisors (37720365).

51223347 is a wasteful number, since it uses less digits than its factorization.

51223347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1552 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 51223347 is about 7157.0487632823. The cubic root of 51223347 is about 371.3835393489.

The spelling of 51223347 in words is "fifty-one million, two hundred twenty-three thousand, three hundred forty-seven".