621153226 has 8 divisors (see below), whose sum is σ = 972239904. Its totient is φ = 297073260.

The previous prime is 621153217. The next prime is 621153241. The reversal of 621153226 is 622351126.

621153226 = T₂₀₃₄₈ + T₂₀₃₄₉ + T₂₀₃₅₀.

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

It is a junction number, because it is equal to n+sod(n) for n = 621153194 and 621153203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6751620 + ... + 6751711.

It is an arithmetic number, because the mean of its divisors is an integer number (121529988).

Almost surely, 2^621153226 is an apocalyptic number.

621153226 is the 20350-th centered triangular number.

621153226 is a deficient number, since it is larger than the sum of its proper divisors (351086678).

621153226 is a wasteful number, since it uses less digits than its factorization.

621153226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13503356.

The product of its digits is 4320, while the sum is 28.

The square root of 621153226 is about 24922.9457729218. The cubic root of 621153226 is about 853.2302579695.

It can be divided in two parts, 62115 and 3226, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 621153226 in words is "six hundred twenty-one million, one hundred fifty-three thousand, two hundred twenty-six".