51246155 has 8 divisors (see below), whose sum is σ = 61616112. Its totient is φ = 40916448.

The previous prime is 51246127. The next prime is 51246157. The reversal of 51246155 is 55164215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51246155 - 2¹⁴ = 51229771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51246157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7184 + ... + 12413.

It is an arithmetic number, because the mean of its divisors is an integer number (7702014).

Almost surely, 2^51246155 is an apocalyptic number.

51246155 is a deficient number, since it is larger than the sum of its proper divisors (10369957).

51246155 is a wasteful number, since it uses less digits than its factorization.

51246155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20125.

The product of its digits is 6000, while the sum is 29.

The square root of 51246155 is about 7158.6419801524. The cubic root of 51246155 is about 371.4386526216.

The spelling of 51246155 in words is "fifty-one million, two hundred forty-six thousand, one hundred fifty-five".