61223455 has 8 divisors (see below), whose sum is σ = 75260304. Its totient is φ = 47784000.

The previous prime is 61223423. The next prime is 61223467. The reversal of 61223455 is 55432216.

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

It is not a de Polignac number, because 61223455 - 2⁵ = 61223423 is a prime.

It is a super-2 number, since 2×61223455² = 7496622884274050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149121 + ... + 149530.

It is an arithmetic number, because the mean of its divisors is an integer number (9407538).

Almost surely, 2^61223455 is an apocalyptic number.

61223455 is a deficient number, since it is larger than the sum of its proper divisors (14036849).

61223455 is a wasteful number, since it uses less digits than its factorization.

61223455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298697.

The product of its digits is 7200, while the sum is 28.

The square root of 61223455 is about 7824.5418396223. The cubic root of 61223455 is about 394.1298046888.

The spelling of 61223455 in words is "sixty-one million, two hundred twenty-three thousand, four hundred fifty-five".