1630212551 has 12 divisors (see below), whose sum is σ = 1797689712. Its totient is φ = 1477212000.

The previous prime is 1630212511. The next prime is 1630212557. The reversal of 1630212551 is 1552120361.

It is not a de Polignac number, because 1630212551 - 2¹⁴ = 1630196167 is a prime.

It is a super-2 number, since 2×1630212551² = 5315185922875855202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1630212551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630212557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15971 + ... + 59291.

It is an arithmetic number, because the mean of its divisors is an integer number (149807476).

Almost surely, 2^1630212551 is an apocalyptic number.

1630212551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1630212551 is a deficient number, since it is larger than the sum of its proper divisors (167477161).

1630212551 is a wasteful number, since it uses less digits than its factorization.

1630212551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43654 (or 43643 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1630212551 is about 40375.8907146332. The cubic root of 1630212551 is about 1176.9230741351.

It can be divided in two parts, 16302 and 12551, that multiplied together give a palindrome (204606402).

The spelling of 1630212551 in words is "one billion, six hundred thirty million, two hundred twelve thousand, five hundred fifty-one".