73151421 has 16 divisors (see below), whose sum is σ = 114188928. Its totient is φ = 40780800.

The previous prime is 73151399. The next prime is 73151423. The reversal of 73151421 is 12415137.

It is not a de Polignac number, because 73151421 - 2¹⁰ = 73150397 is a prime.

It is a super-2 number, since 2×73151421² = 10702260788638482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73151391 and 73151400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73151423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41620 + ... + 43341.

It is an arithmetic number, because the mean of its divisors is an integer number (7136808).

Almost surely, 2^73151421 is an apocalyptic number.

It is an amenable number.

73151421 is a deficient number, since it is larger than the sum of its proper divisors (41037507).

73151421 is a wasteful number, since it uses less digits than its factorization.

73151421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85012.

The product of its digits is 840, while the sum is 24.

The square root of 73151421 is about 8552.8603987204. The cubic root of 73151421 is about 418.2226879787. Note that the first 3 decimals are identical.

Adding to 73151421 its reverse (12415137), we get a palindrome (85566558).

The spelling of 73151421 in words is "seventy-three million, one hundred fifty-one thousand, four hundred twenty-one".