61897225 has 24 divisors (see below), whose sum is σ = 83119680. Its totient is φ = 45453120.

The previous prime is 61897207. The next prime is 61897237. The reversal of 61897225 is 52279816.

It is not a de Polignac number, because 61897225 - 2¹¹ = 61895177 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73356 + ... + 74194.

It is an arithmetic number, because the mean of its divisors is an integer number (3463320).

Almost surely, 2^61897225 is an apocalyptic number.

61897225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61897225 is a deficient number, since it is larger than the sum of its proper divisors (21222455).

61897225 is a wasteful number, since it uses less digits than its factorization.

61897225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1084 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 61897225 is about 7867.4789481765. The cubic root of 61897225 is about 395.5703452256.

The spelling of 61897225 in words is "sixty-one million, eight hundred ninety-seven thousand, two hundred twenty-five".