25470531 has 14 divisors (see below), whose sum is σ = 38189420. Its totient is φ = 16979868.

The previous prime is 25470527. The next prime is 25470547. The reversal of 25470531 is 13507452.

It is a happy number.

It is not a de Polignac number, because 25470531 - 2² = 25470527 is a prime.

It is a super-2 number, since 2×25470531² = 1297495898843922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25470495 and 25470504.

It is not an unprimeable number, because it can be changed into a prime (25470521) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 16741 + ... + 18198.

Almost surely, 2^25470531 is an apocalyptic number.

25470531 is a deficient number, since it is larger than the sum of its proper divisors (12718889).

25470531 is an frugal number, since it uses more digits than its factorization.

25470531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34957 (or 34942 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 25470531 is about 5046.8337598934. The cubic root of 25470531 is about 294.2248384218.

Adding to 25470531 its reverse (13507452), we get a palindrome (38977983).

The spelling of 25470531 in words is "twenty-five million, four hundred seventy thousand, five hundred thirty-one".