51223425 has 48 divisors (see below), whose sum is σ = 95618880. Its totient is φ = 23968000.

The previous prime is 51223423. The next prime is 51223427. The reversal of 51223425 is 52432215.

It is an interprime number because it is at equal distance from previous prime (51223423) and next prime (51223427).

It is not a de Polignac number, because 51223425 - 2¹ = 51223423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51223395 and 51223404.

It is not an unprimeable number, because it can be changed into a prime (51223423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22855 + ... + 24995.

It is an arithmetic number, because the mean of its divisors is an integer number (1992060).

Almost surely, 2^51223425 is an apocalyptic number.

51223425 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51223425 is a deficient number, since it is larger than the sum of its proper divisors (44395455).

51223425 is a wasteful number, since it uses less digits than its factorization.

51223425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194 (or 2189 counting only the distinct ones).

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

The square root of 51223425 is about 7157.0542124536. The cubic root of 51223425 is about 371.3837278561.

The spelling of 51223425 in words is "fifty-one million, two hundred twenty-three thousand, four hundred twenty-five".