25531943 has 8 divisors (see below), whose sum is σ = 27078480. Its totient is φ = 23990400.

The previous prime is 25531927. The next prime is 25531963. The reversal of 25531943 is 34913552.

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

It is not a de Polignac number, because 25531943 - 2⁴ = 25531927 is a prime.

It is a super-2 number, since 2×25531943² = 1303760226710498, 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 (25531903) 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, 17153 + ... + 18581.

It is an arithmetic number, because the mean of its divisors is an integer number (3384810).

Almost surely, 2^25531943 is an apocalyptic number.

25531943 is a deficient number, since it is larger than the sum of its proper divisors (1546537).

25531943 is a wasteful number, since it uses less digits than its factorization.

25531943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497.

The product of its digits is 16200, while the sum is 32.

The square root of 25531943 is about 5052.9143076051. The cubic root of 25531943 is about 294.4611171393.

The spelling of 25531943 in words is "twenty-five million, five hundred thirty-one thousand, nine hundred forty-three".