51155232225 has 48 divisors (see below), whose sum is σ = 87722956800. Its totient is φ = 26272798720.

The previous prime is 51155232223. The next prime is 51155232229. The reversal of 51155232225 is 52223255115.

It is not a de Polignac number, because 51155232225 - 2¹ = 51155232223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51155232221) 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, 802321 + ... + 863729.

It is an arithmetic number, because the mean of its divisors is an integer number (1827561600).

Almost surely, 2^51155232225 is an apocalyptic number.

It is an amenable number.

51155232225 is a deficient number, since it is larger than the sum of its proper divisors (36567724575).

51155232225 is a wasteful number, since it uses less digits than its factorization.

51155232225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61834 (or 61829 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

The spelling of 51155232225 in words is "fifty-one billion, one hundred fifty-five million, two hundred thirty-two thousand, two hundred twenty-five".