51133213430 has 32 divisors (see below), whose sum is σ = 100599184224. Its totient is φ = 18598162176.

The previous prime is 51133213429. The next prime is 51133213433. The reversal of 51133213430 is 3431233115.

It is a super-2 number, since 2×51133213430² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 51133213430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51133213433) 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, 2926607 + ... + 2944026.

It is an arithmetic number, because the mean of its divisors is an integer number (3143724507).

Almost surely, 2^51133213430 is an apocalyptic number.

51133213430 is a deficient number, since it is larger than the sum of its proper divisors (49465970794).

51133213430 is a wasteful number, since it uses less digits than its factorization.

51133213430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870720.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 51133213430 its reverse (3431233115), we get a palindrome (54564446545).

The spelling of 51133213430 in words is "fifty-one billion, one hundred thirty-three million, two hundred thirteen thousand, four hundred thirty".