515151423120 has 40 divisors (see below), whose sum is σ = 1596969412416. Its totient is φ = 137373712768.

The previous prime is 515151423053. The next prime is 515151423131. The reversal of 515151423120 is 21324151515.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×515151423120² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073231892 + ... + 1073232371.

Almost surely, 2^515151423120 is an apocalyptic number.

It is an amenable number.

515151423120 is an abundant number, since it is smaller than the sum of its proper divisors (1081817989296).

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

515151423120 is a wasteful number, since it uses less digits than its factorization.

515151423120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146464279 (or 2146464273 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 515151423120 its reverse (21324151515), we get a palindrome (536475574635).

The spelling of 515151423120 in words is "five hundred fifteen billion, one hundred fifty-one million, four hundred twenty-three thousand, one hundred twenty".