51970020 has 48 divisors (see below), whose sum is σ = 154078848. Its totient is φ = 13043200.

The previous prime is 51970013. The next prime is 51970027. The reversal of 51970020 is 2007915.

It is an interprime number because it is at equal distance from previous prime (51970013) and next prime (51970027).

It is not an unprimeable number, because it can be changed into a prime (51970027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24456 + ... + 26495.

It is an arithmetic number, because the mean of its divisors is an integer number (3209976).

Almost surely, 2^51970020 is an apocalyptic number.

It is an amenable number.

51970020 is an abundant number, since it is smaller than the sum of its proper divisors (102108828).

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

51970020 is a wasteful number, since it uses less digits than its factorization.

51970020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50980 (or 50978 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 51970020 is about 7209.0235122380. The cubic root of 51970020 is about 373.1793706840.

Adding to 51970020 its reverse (2007915), we get a palindrome (53977935).

The spelling of 51970020 in words is "fifty-one million, nine hundred seventy thousand, twenty".