1651222490 has 16 divisors (see below), whose sum is σ = 2981026152. Its totient is φ = 658527744.

The previous prime is 1651222477. The next prime is 1651222513. The reversal of 1651222490 is 942221561.

It can be written as a sum of positive squares in 4 ways, for example, as 1222691089 + 428531401 = 34967^2 + 20701^2 .

It is a super-2 number, since 2×1651222490² = 5453071422963600200, which contains 22 as substring.

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, 241619 + ... + 248358.

Almost surely, 2^1651222490 is an apocalyptic number.

1651222490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1651222490 is a deficient number, since it is larger than the sum of its proper divisors (1329803662).

1651222490 is a wasteful number, since it uses less digits than its factorization.

1651222490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490321.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1651222490 is about 40635.2370486503. The cubic root of 1651222490 is about 1181.9575116689.

The spelling of 1651222490 in words is "one billion, six hundred fifty-one million, two hundred twenty-two thousand, four hundred ninety".