513511380 has 48 divisors (see below), whose sum is σ = 1597592640. Its totient is φ = 136936224.

The previous prime is 513511351. The next prime is 513511387. The reversal of 513511380 is 83115315.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513511387) 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, 474934 + ... + 476013.

It is an arithmetic number, because the mean of its divisors is an integer number (33283180).

Almost surely, 2^513511380 is an apocalyptic number.

It is an amenable number.

513511380 is an abundant number, since it is smaller than the sum of its proper divisors (1084081260).

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

513511380 is a wasteful number, since it uses less digits than its factorization.

513511380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950965 (or 950957 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 513511380 is about 22660.7894831579. The cubic root of 513511380 is about 800.7864037914.

Adding to 513511380 its reverse (83115315), we get a palindrome (596626695).

The spelling of 513511380 in words is "five hundred thirteen million, five hundred eleven thousand, three hundred eighty".