513151397 has 4 divisors (see below), whose sum is σ = 559801536. Its totient is φ = 466501260.

The previous prime is 513151363. The next prime is 513151423. The reversal of 513151397 is 793151315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 513151397 - 2⁶ = 513151333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513151357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23325053 + ... + 23325074.

It is an arithmetic number, because the mean of its divisors is an integer number (139950384).

Almost surely, 2^513151397 is an apocalyptic number.

It is an amenable number.

513151397 is a deficient number, since it is larger than the sum of its proper divisors (46650139).

513151397 is a wasteful number, since it uses less digits than its factorization.

513151397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46650138.

The product of its digits is 14175, while the sum is 35.

The square root of 513151397 is about 22652.8452296836. The cubic root of 513151397 is about 800.5992369692.

The spelling of 513151397 in words is "five hundred thirteen million, one hundred fifty-one thousand, three hundred ninety-seven".