51013212 has 24 divisors (see below), whose sum is σ = 119298816. Its totient is φ = 16966128.

The previous prime is 51013201. The next prime is 51013219. The reversal of 51013212 is 21231015.

It is a junction number, because it is equal to n+sod(n) for n = 51013191 and 51013200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013219) 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, 1053 + ... + 10155.

It is an arithmetic number, because the mean of its divisors is an integer number (4970784).

Almost surely, 2^51013212 is an apocalyptic number.

It is an amenable number.

51013212 is an abundant number, since it is smaller than the sum of its proper divisors (68285604).

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

51013212 is a wasteful number, since it uses less digits than its factorization.

51013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9577 (or 9575 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 51013212 is about 7142.3533936651. The cubic root of 51013212 is about 370.8749975435.

Adding to 51013212 its reverse (21231015), we get a palindrome (72244227).

The spelling of 51013212 in words is "fifty-one million, thirteen thousand, two hundred twelve".