31025661 has 8 divisors (see below), whose sum is σ = 42329760. Its totient is φ = 20202672.

The previous prime is 31025641. The next prime is 31025677. The reversal of 31025661 is 16652013.

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

It is not a de Polignac number, because 31025661 - 2¹⁵ = 30992893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31025611) 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 7 ways as a sum of consecutive naturals, for example, 120126 + ... + 120383.

It is an arithmetic number, because the mean of its divisors is an integer number (5291220).

Almost surely, 2^31025661 is an apocalyptic number.

It is an amenable number.

31025661 is a deficient number, since it is larger than the sum of its proper divisors (11304099).

31025661 is a wasteful number, since it uses less digits than its factorization.

31025661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240555.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 31025661 is about 5570.0683119689. The cubic root of 31025661 is about 314.2247197946.

Adding to 31025661 its reverse (16652013), we get a palindrome (47677674).

The spelling of 31025661 in words is "thirty-one million, twenty-five thousand, six hundred sixty-one".