51455970 has 48 divisors (see below), whose sum is σ = 138108672. Its totient is φ = 13278240.

The previous prime is 51455959. The next prime is 51455981. The reversal of 51455970 is 7955415.

51455970 is a `hidden beast` number, since 514 + 55 + 97 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51455959) and next prime (51455981).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6432 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (2877264).

Almost surely, 2^51455970 is an apocalyptic number.

51455970 is an abundant number, since it is smaller than the sum of its proper divisors (86652702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51455970 is a wasteful number, since it uses less digits than its factorization.

51455970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18487 (or 18484 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 51455970 is about 7173.2816757743. The cubic root of 51455970 is about 371.9448843076.

It can be divided in two parts, 51455 and 970, that added together give a palindrome (52425).

The spelling of 51455970 in words is "fifty-one million, four hundred fifty-five thousand, nine hundred seventy".