61815043 has 8 divisors (see below), whose sum is σ = 65692512. Its totient is φ = 57964416.

The previous prime is 61815031. The next prime is 61815073. The reversal of 61815043 is 34051816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61815043 - 2¹⁷ = 61683971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61815073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1855 + ... + 11272.

It is an arithmetic number, because the mean of its divisors is an integer number (8211564).

Almost surely, 2^61815043 is an apocalyptic number.

61815043 is a deficient number, since it is larger than the sum of its proper divisors (3877469).

61815043 is a wasteful number, since it uses less digits than its factorization.

61815043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 61815043 is about 7862.2543204860. The cubic root of 61815043 is about 395.3951991927.

Adding to 61815043 its reverse (34051816), we get a palindrome (95866859).

The spelling of 61815043 in words is "sixty-one million, eight hundred fifteen thousand, forty-three".