615143401 has 4 divisors (see below), whose sum is σ = 615259204. Its totient is φ = 615027600.

The previous prime is 615143369. The next prime is 615143407. The reversal of 615143401 is 104341516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135489600 + 479653801 = 11640^2 + 21901^2 .

It is a cyclic number.

It is not a de Polignac number, because 615143401 - 2⁵ = 615143369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615143407) 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, 49530 + ... + 60691.

It is an arithmetic number, because the mean of its divisors is an integer number (153814801).

Almost surely, 2^615143401 is an apocalyptic number.

It is an amenable number.

615143401 is a deficient number, since it is larger than the sum of its proper divisors (115803).

615143401 is a wasteful number, since it uses less digits than its factorization.

615143401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115802.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 615143401 is about 24802.0846099678. The cubic root of 615143401 is about 850.4695910410.

Adding to 615143401 its reverse (104341516), we get a palindrome (719484917).

The spelling of 615143401 in words is "six hundred fifteen million, one hundred forty-three thousand, four hundred one".