1507220161 has 4 divisors (see below), whose sum is σ = 1559193300. Its totient is φ = 1455247024.

The previous prime is 1507220101. The next prime is 1507220173. The reversal of 1507220161 is 1610227051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1610227051 = 10853 ⋅148367.

It can be written as a sum of positive squares in 2 ways, for example, as 465221761 + 1041998400 = 21569^2 + 32280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1507220161 - 2¹⁵ = 1507187393 is a prime.

It is a super-2 number, since 2×1507220161² = 4543425227449731842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1507220101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25986526 + ... + 25986583.

It is an arithmetic number, because the mean of its divisors is an integer number (389798325).

Almost surely, 2^1507220161 is an apocalyptic number.

It is an amenable number.

1507220161 is a deficient number, since it is larger than the sum of its proper divisors (51973139).

1507220161 is an equidigital number, since it uses as much as digits as its factorization.

1507220161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51973138.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1507220161 is about 38822.9334414596. The cubic root of 1507220161 is about 1146.5479748679.

The spelling of 1507220161 in words is "one billion, five hundred seven million, two hundred twenty thousand, one hundred sixty-one".