61854031 has 4 divisors (see below), whose sum is σ = 61877200. Its totient is φ = 61830864.

The previous prime is 61854029. The next prime is 61854059. The reversal of 61854031 is 13045816.

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 61854031 - 2¹ = 61854029 is a prime.

It is a super-2 number, since 2×61854031² = 7651842301897922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61854011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6966 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (15469300).

Almost surely, 2^61854031 is an apocalyptic number.

61854031 is a deficient number, since it is larger than the sum of its proper divisors (23169).

61854031 is a wasteful number, since it uses less digits than its factorization.

61854031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23168.

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

The square root of 61854031 is about 7864.7333711957. The cubic root of 61854031 is about 395.4783096430.

Adding to 61854031 its reverse (13045816), we get a palindrome (74899847).

The spelling of 61854031 in words is "sixty-one million, eight hundred fifty-four thousand, thirty-one".