61822251 has 24 divisors (see below), whose sum is σ = 97241040. Its totient is φ = 38684736.

The previous prime is 61822247. The next prime is 61822279. The reversal of 61822251 is 15222816.

It is a happy number.

61822251 is a `hidden beast` number, since 618 + 22 + 25 + 1 = 666.

It is not a de Polignac number, because 61822251 - 2² = 61822247 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (61822451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168270 + ... + 168636.

It is an arithmetic number, because the mean of its divisors is an integer number (4051710).

Almost surely, 2^61822251 is an apocalyptic number.

61822251 is a deficient number, since it is larger than the sum of its proper divisors (35418789).

61822251 is an equidigital number, since it uses as much as digits as its factorization.

61822251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 387 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 61822251 is about 7862.7126998257. The cubic root of 61822251 is about 395.4105670691.

The spelling of 61822251 in words is "sixty-one million, eight hundred twenty-two thousand, two hundred fifty-one".