65131450 has 24 divisors (see below), whose sum is σ = 121930812. Its totient is φ = 25883520.

The previous prime is 65131447. The next prime is 65131453. The reversal of 65131450 is 5413156.

It is an interprime number because it is at equal distance from previous prime (65131447) and next prime (65131453).

It can be written as a sum of positive squares in 6 ways, for example, as 39050001 + 26081449 = 6249^2 + 5107^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (65131453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3702 + ... + 11998.

Almost surely, 2^65131450 is an apocalyptic number.

65131450 is a deficient number, since it is larger than the sum of its proper divisors (56799362).

65131450 is a wasteful number, since it uses less digits than its factorization.

65131450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8466 (or 8461 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 65131450 is about 8070.4058138361. The cubic root of 65131450 is about 402.3434315107.

The spelling of 65131450 in words is "sixty-five million, one hundred thirty-one thousand, four hundred fifty".