1220312451545 has 32 divisors (see below), whose sum is σ = 1691906123520. Its totient is φ = 835078973440.

The previous prime is 1220312451539. The next prime is 1220312451623. The reversal of 1220312451545 is 5451542130221.

It is not a de Polignac number, because 1220312451545 - 2⁴ = 1220312451529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3507524 + ... + 3839706.

It is an arithmetic number, because the mean of its divisors is an integer number (52872066360).

Almost surely, 2^{1220312451545} is an apocalyptic number.

It is an amenable number.

1220312451545 is a deficient number, since it is larger than the sum of its proper divisors (471593671975).

1220312451545 is a wasteful number, since it uses less digits than its factorization.

1220312451545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336145.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 1220312451545 its reverse (5451542130221), we get a palindrome (6671854581766).

The spelling of 1220312451545 in words is "one trillion, two hundred twenty billion, three hundred twelve million, four hundred fifty-one thousand, five hundred forty-five".