61013031 has 4 divisors (see below), whose sum is σ = 81350712. Its totient is φ = 40675352.

The previous prime is 61012981. The next prime is 61013033. The reversal of 61013031 is 13031016.

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

It is a cyclic number.

It is not a de Polignac number, because 61013031 - 2¹⁷ = 60881959 is a prime.

It is a super-2 number, since 2×61013031² = 7445179903613922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61013031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61013033) 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, 10168836 + ... + 10168841.

It is an arithmetic number, because the mean of its divisors is an integer number (20337678).

Almost surely, 2^61013031 is an apocalyptic number.

61013031 is a deficient number, since it is larger than the sum of its proper divisors (20337681).

61013031 is a wasteful number, since it uses less digits than its factorization.

61013031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20337680.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 61013031 is about 7811.0838556503. The cubic root of 61013031 is about 393.6777471859.

Adding to 61013031 its reverse (13031016), we get a palindrome (74044047).

The spelling of 61013031 in words is "sixty-one million, thirteen thousand, thirty-one".