61015281 has 16 divisors (see below), whose sum is σ = 82293120. Its totient is φ = 40210560.

The previous prime is 61015277. The next prime is 61015291. The reversal of 61015281 is 18251016.

It is not a de Polignac number, because 61015281 - 2² = 61015277 is a prime.

It is a super-2 number, since 2×61015281² = 7445729031017922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61015271) 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, 169780 + ... + 170138.

It is an arithmetic number, because the mean of its divisors is an integer number (5143320).

Almost surely, 2^61015281 is an apocalyptic number.

It is an amenable number.

61015281 is a deficient number, since it is larger than the sum of its proper divisors (21277839).

61015281 is a wasteful number, since it uses less digits than its factorization.

61015281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 61015281 is about 7811.2278804296. The cubic root of 61015281 is about 393.6825863928.

Adding to 61015281 its reverse (18251016), we get a palindrome (79266297).

The spelling of 61015281 in words is "sixty-one million, fifteen thousand, two hundred eighty-one".