513012320154 has 40 divisors (see below), whose sum is σ = 1180595933748. Its totient is φ = 166382372160.

The previous prime is 513012320153. The next prime is 513012320207. The reversal of 513012320154 is 451023210315.

513012320154 is a `hidden beast` number, since 513 + 0 + 123 + 20 + 1 + 5 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 439405917129 + 73606403025 = 662877^2 + 271305^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (513012320153) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42787827 + ... + 42799814.

Almost surely, 2^513012320154 is an apocalyptic number.

513012320154 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

513012320154 is an abundant number, since it is smaller than the sum of its proper divisors (667583613594).

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

513012320154 is a wasteful number, since it uses less digits than its factorization.

513012320154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85587692 (or 85587683 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 513012320154 its reverse (451023210315), we get a palindrome (964035530469).

The spelling of 513012320154 in words is "five hundred thirteen billion, twelve million, three hundred twenty thousand, one hundred fifty-four".