51155423 has 24 divisors (see below), whose sum is σ = 59431680. Its totient is φ = 43636320.

The previous prime is 51155387. The next prime is 51155443. The reversal of 51155423 is 32455115.

It is not a de Polignac number, because 51155423 - 2⁶ = 51155359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51155392 and 51155401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 647498 + ... + 647576.

It is an arithmetic number, because the mean of its divisors is an integer number (2476320).

Almost surely, 2^51155423 is an apocalyptic number.

51155423 is a deficient number, since it is larger than the sum of its proper divisors (8276257).

51155423 is a wasteful number, since it uses less digits than its factorization.

51155423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 170 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 51155423 is about 7152.3019371388. The cubic root of 51155423 is about 371.2193107607.

The spelling of 51155423 in words is "fifty-one million, one hundred fifty-five thousand, four hundred twenty-three".