51245021452 has 12 divisors (see below), whose sum is σ = 91866075336. Its totient is φ = 24997571360.

The previous prime is 51245021449. The next prime is 51245021461. The reversal of 51245021452 is 25412054215.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156234658 + ... + 156234985.

It is an arithmetic number, because the mean of its divisors is an integer number (7655506278).

Almost surely, 2^51245021452 is an apocalyptic number.

It is an amenable number.

51245021452 is a deficient number, since it is larger than the sum of its proper divisors (40621053884).

51245021452 is a wasteful number, since it uses less digits than its factorization.

51245021452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312469688 (or 312469686 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 51245021452 its reverse (25412054215), we get a palindrome (76657075667).

The spelling of 51245021452 in words is "fifty-one billion, two hundred forty-five million, twenty-one thousand, four hundred fifty-two".